Government Job and Other Recruitment Exams MCQs
Showing 50 questions (Total: 12229)
A compiler can check ;
Correct Answer:
B: syntax error
Explanation:
A compiler can check ; Correct Answer syntax error Compiler হচ্ছে সংকলনকারী, রচয়িতা, সংগ্রাহক। যা বাক্যে/ Sentece এর গঠন সম্পর্কিত ভুল চেক করতে পারে।
Which concept, enables programmers to assign a different meaning or usage to a variable, function, or an object in different contexts?
Correct Answer:
C: Polymorphism
Explanation:
Which concept, enables programmers to assign a different meaning or usage to a variable, function, or an object in different contexts? Correct Answer Polymorphism Polymorphism is the ability of an object to take on many forms. The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object. Any Java object that can pass more than one IS - A test is considered to be polymorphic.
The process to discover plain text or key is known as-
Correct Answer:
A: Cryptanalysis
Explanation:
The process to discover plain text or key is known as- Correct Answer Cryptanalysis The process of attempting to discover the plaintext or key is known as cryptanalysis. The strategy used by cryptanalyst depends on the nature of the encryption scheme and the information available to the cryptanalyst.
কোনটি নিত্য সমাসের সমস্ত পদ ?
Correct Answer:
গ: গ্রামান্তর
Explanation:
কোনটি নিত্য সমাসের সমস্ত পদ ? সঠিক উত্তর গ্রামান্তর নিত্য সমাস: যে সমাসে সমস্যমান পদ দ্বারা সমাস - বাক্য হয় না, অন্য পদের দ্বারা সমস্ত পদের অর্থ প্রকাশ করতে হয়, তাকে নিত্য সমাস বলে। তদর্থবাচক ব্যাখ্যামূলক শব্দ বা বাক্যাংশ যোগে এগুলোর অর্থ বিশদ করতে হয়। যেমন: অন্য গ্রাম = গ্রামান্তর, কেবল দর্শন = দর্শনমাত্র, অন্য গৃহ = গৃহান্তর, (বিষাক্ত) কাল (যম) তুল্য (কাল বর্ণের নয়) সাপ = কালসাপ, তুমি আমি ও সে = আমরা, দুই এবং নব্বই = বিরানব্বই।
ক্রিয়াপদের সাথে সম্পর্কযুক্ত পদকে কী বলা হয়?
Correct Answer:
খ: কারক
Explanation:
ক্রিয়াপদের সাথে সম্পর্কযুক্ত পদকে কী বলা হয়? সঠিক উত্তর কারক কারক শব্দটির অর্থ হলো - যা ক্রিয়া সম্পাদন করে। বাক্যস্থিত ক্রিয়াপদের সঙ্গে নামপদের যে সম্পর্ক, তাকে কারক বলে। কারক ছয় প্রকার: ১. কর্তৃকারক ২. কর্ম কারক ৩. করণ কারক ৪. সম্প্রদান কারক ৫. অপাদান কারক এবং ৬. অধিকরণ কারক।
নিচের কোন শব্দে 'ণ' এর ভুল প্রয়োগ রয়েছে?
Correct Answer:
ক: ক্রন্দণ
Explanation:
নিচের কোন শব্দে 'ণ' এর ভুল প্রয়োগ রয়েছে? সঠিক উত্তর ক্রন্দণ ক্রন্দণ শব্দে ”ণ” এর ভুল প্রয়োগ রয়েছে। সঠিক: ক্রন্দন - [বিশেষ্য পদ] কান্না, রোদন।
নিচের কো বানানটি শুদ্ধ?
Correct Answer:
গ: নিশীথিনী
Explanation:
নিচের কো বানানটি শুদ্ধ? সঠিক উত্তর নিশীথিনী নিশীথিনী - [বিশেষ্য পদ] রাত্রি, রজনী।
'চেষ্টায় সুসিদ্ধ করে জীবনের আশা' - বাক্যটি কার রচনা?
Correct Answer:
ঘ: ঈশ্বরচন্দ্র গুপ্ত
Explanation:
'চেষ্টায় সুসিদ্ধ করে জীবনের আশা' - বাক্যটি কার রচনা? সঠিক উত্তর ঈশ্বরচন্দ্র গুপ্ত ঈশ্বরচন্দ্র গুপ্ত (৬ মার্চ ১৮১২ - ২৩ জানুয়ারি ১৮৫৯) ঊনবিংশ শতাব্দীর একজন বাঙ্গালী কবি ও সাহিত্যিক এবং সাংবাদিক । তিনি সংবাদ প্রভাকর (বা 'সম্বাদ প্রভাকর') এর সম্পাদক। কিন্তু ব্যাপক ভাবে বলতে গেলে তিনি ঊনবিংশ শতাব্দীর একজন কবি ও সাহিত্যিক। তার হাত ধরেই মধ্যযুগের গণ্ডি পেড়িয়ে বাংলা কবিতা আধুনিকতার পথে নাগরিক রূপ পেয়েছিল। তিনি "গুপ্ত কবি" নামে সমধিক পরিচিত। বঙ্কিমচন্দ্র চট্টোপাধ্যায়ের মতো তার পরবর্তী সাহিত্যিকরা ঈশ্বর গুপ্তকে 'গুরু'পদে বরণ করেছিলেন। তার ছদ্মনাম 'ভ্রমণকারী বন্ধু'। এছাড়া বহুবিধ পত্র - পত্রিকা তিনি সম্পাদনা করেছেন।
'বলাম' শব্দের 'ব' উপসর্গ কী অর্থ নির্দেশ করে? (প্রকৃতপক্ষে শব্দটি হতো - বনাম / বমাল)
Correct Answer:
ক: সহিত
Explanation:
'বলাম' শব্দের 'ব' উপসর্গ কী অর্থ নির্দেশ করে? (প্রকৃতপক্ষে শব্দটি হতো - বনাম / বমাল) সঠিক উত্তর সহিত ”বলাম” শব্দের ’ব’ উপসর্গ ’সহিত’ অর্থ নির্দেশ করে (প্রকৃতপক্ষে শব্দটি হতো - বনাম / বমাল) ।
'শিক্ষায় আমাদের আগ্রহ বাড়ে' - শিক্ষায় কোন কারক?
Correct Answer:
গ: অধিকরণ
Explanation:
'শিক্ষায় আমাদের আগ্রহ বাড়ে' - শিক্ষায় কোন কারক? সঠিক উত্তর অধিকরণ 'করণ' শব্দের অর্থ: যন্ত্র, সহায়ক বা উপায়। ক্রিয়া সম্পাদনের যন্ত্র, উপকরণ বা সহায়ককেই করণ কারক বলা হয়। বাক্যস্থিত ক্রিয়াপদের সঙ্গে 'কিসের দ্বারা' বা 'কী উপায়ে' প্রশ্ন করলে যে উত্তরটি পাওয়া যায়, তা - ই করণ কারক। যেমন - নীরা কলম দিয়ে লেখে। (উপকরণ - কলম) 'জগতে কীর্তিমান হয় সাধনায়।' (উপায় - সাধনা)
নিচের কোনটির পুরুষবাচক রুপ নেই?
Correct Answer:
খ: কুলটা
Explanation:
নিচের কোনটির পুরুষবাচক রুপ নেই? সঠিক উত্তর কুলটা কুলটা - [বিশেষ্য] [বিশেষণ পদ] (স্ত্রীলিঙ্গ) কুলত্যাগকারিণী, ভ্রষ্টা।
'বক্তব্য' এর সঠিক প্রকৃতি প্রত্যয় কোনটি?
Correct Answer:
গ: বচ্ + তব্য
Explanation:
'বক্তব্য' এর সঠিক প্রকৃতি প্রত্যয় কোনটি? সঠিক উত্তর বচ্ + তব্য ”বক্তব্য” এর সঠিক প্রকৃতি প্রত্যয় - বচ্ + তব্য
'নবোঢ়া' শব্দের সন্ধিবিচ্ছেদ কোনটি?
Correct Answer:
ক: নব + ঊঢ়া
Explanation:
'নবোঢ়া' শব্দের সন্ধিবিচ্ছেদ কোনটি? সঠিক উত্তর নব + ঊঢ়া বাংলাএর অভিধানে নবোঢ়া এর সংজ্ঞা. নবোঢ়া [ nabōḍh়ā ] বিণ. (স্ত্রী.) নববিবাহিতা, নতুন বিবাহ হয়েছে এমন (নবোঢ়া কন্যা)। [সং. নব + ঊঢ়া ,অ + ঊ = ও]।
A B C subscribe TK. 50,000 for a business .A subscribes TK. 4000 more than B and B TK, 5000 more than C Out of a total Profit of TK. 35,000. A receives
Correct Answer:
A: Tk. 14,700
Explanation:
A B C subscribe TK. 50,000 for a business .A subscribes TK. 4000 more than B and B TK, 5000 more than C Out of a total Profit of TK. 35,000. A receives Correct Answer Tk. 14,700 Let C = x. Then, B = x + 5000 and A = x + 5000 + 4000 = x + 9000 So, x + x + 5000 + x + 9000 = 50000 ⇒ 3x = 36000 ⇒ x = 12000 A : B : C = 21000 : 17000 : 12000 = 21 : 17 : 12 So A's Share = Tk. 35000 × 2150 = Tk. 14700
The sum of the present ages of a father and his son is 60 years . Six years ago, father's age was five times the age of the son. After 6 years, son's age will be -
Correct Answer:
D: 20 years
Explanation:
The sum of the present ages of a father and his son is 60 years . Six years ago, father's age was five times the age of the son. After 6 years, son's age will be - Correct Answer 20 years Let the present ages of son and father be x and (60 - x) years respectively. Then, (60 - x) - 6 = 5(x - 6) ⇒ 54 - x = 5x - 30 ⇒ 6x = 84 ⇒ x = 14 ∴ Son's age after 6 years = (x + 6) = 20 years.
A monkey climbs a 60 m high pole.s In first minute he climbs 6 m and slips down 3 m in the next minute. How much time is required by it to reach the top?
Correct Answer:
C: 37 minutes
Explanation:
A monkey climbs a 60 m high pole.s In first minute he climbs 6 m and slips down 3 m in the next minute. How much time is required by it to reach the top? Correct Answer 37 minutes A monkey climbs 6 m in 1st minute and slips down 3 m in next minute i.e. Monkey climbs 3 meters in 2 minutes. Then he climbs in one minute = 3/2 m. But in the last minute, he climbs 6 m as he gets on the top so there is no slip. The time required = 2 × 54/3 + 6/6 = 37 minutes.
In a class , the number of girls is 20% more than that of boys. The strength of the class is 66. If 4 more girls are admitted to the class , the ratio of the number of boys to that of the girls is -
Correct Answer:
D: 3 : 4
Explanation:
In a class , the number of girls is 20% more than that of boys. The strength of the class is 66. If 4 more girls are admitted to the class , the ratio of the number of boys to that of the girls is - Correct Answer 3 : 4 Correct option is A)Let the number of boys be x.Then, number of girls = 120% of x 100120×x=56xGiven, x+56x=66⇒511x=66⇒x=30∴Numberofboys=30,numberofgirls=56×30=36If 4 more girls are admitted then new number of girls = 40∴ Required ratio = 30:40 = 3:4
The length of a rectangular plot is 20 meters more than its breadth . If the cost of fencing the plot at TK. 26.50 per meter is TK. 5300, what is the length of the plot in meters?
Correct Answer:
B: 100
Explanation:
The length of a rectangular plot is 20 meters more than its breadth . If the cost of fencing the plot at TK. 26.50 per meter is TK. 5300, what is the length of the plot in meters? Correct Answer 100 Let length of plot = L meters, then breadth = L - 20 meters and perimeter = 2[L + L - 20] = [4L - 40] meters [4L - 40] * 26.50 = 5300 [4L - 40] = 5300 / 26.50 = 200 4L = 240 L = 240/4 = 60 meters.
A trader sells his goods at a discount 20% . He still makes a profit of 25% . If he sells the goods at the marked price only, his profit will be:
Correct Answer:
A: 56. 25%
Explanation:
A trader sells his goods at a discount 20% . He still makes a profit of 25% . If he sells the goods at the marked price only, his profit will be: Correct Answer 56. 25% Let the marked price = Tk. 100 Then, SP = 100 - 20% of 100 = Tk. 80 Profit = 25% Let His CP = X SP = 80 X + 25% of X = 80 Hence, X = Tk. (100 × 80)/125 = Tk. 64 CP = Tk. 64 Profit after selling on marked price = 100 - 64 = Tk. 36 % gain = (36 × 100)/64 = 56.25%
The sum of two numbers is 22 and the sum of their squares is 404, then the product of two numbers is -
Correct Answer:
A: 40
Explanation:
The sum of two numbers is 22 and the sum of their squares is 404, then the product of two numbers is - Correct Answer 40 ATQ, x + y = 22 ... (i) x2 + y2 = 404 ... (ii) Therefore, (x + y)2 = x2 + y2 + 2xy (22)2 = 404 + 2xy 484 = 404 + 2xy Or, 2xy = 80 Or, xy = 40
The cost price of 19 articles is same as the selling price of 29 articles. What is loss percentage?
Correct Answer:
C: 34. 48%
Explanation:
The cost price of 19 articles is same as the selling price of 29 articles. What is loss percentage? Correct Answer 34. 48% Let CP of each article be Tk. 29 and SP of each article be Tk. 19 Loss Percentage = (29x−19x) × 100/29x = 34.48%
What is the rate of simple interest for the first 4 years if the sum of TK. 360 becomes TK. 540 in 9 years and the rate of interest for the last 5 years is 6% ?
Correct Answer:
B: 5%
Explanation:
What is the rate of simple interest for the first 4 years if the sum of TK. 360 becomes TK. 540 in 9 years and the rate of interest for the last 5 years is 6% ? Correct Answer 5% Original sum = Tk. 360 Total interest in 9 years = 540 - 360 = 180 Interest in last 5 years = 5 x 6 = 30% = 30/100 x 360 = Tk. 108 = > Interest in first four years : 180 - 108 = Tk. 72 Interest per annum = 72/4 = 18 Rate of interest for first four years = 18/360 x 100 = 5%
'প্রিয়ংবদা' শব্দটি কোন সমসা?
Correct Answer:
ঘ: উপপদ তৎপুরুষ
Explanation:
'প্রিয়ংবদা' শব্দটি কোন সমসা? সঠিক উত্তর উপপদ তৎপুরুষ যে পদের পরবর্তী ক্রিয়ামূলের সঙ্গে কৃৎ প্রত্যয় যুক্ত হয়, সে পদকে উপপদ বলে।[১] কৃদন্ত পদের সাথে উপপদের যে সমাস হয়, তাকে উপপদ তৎপুরুষ সমাস বলে। যেমন: জলে চরে যা = জলচর, জল দেয় যা = জলদ, পঙ্কে জন্মে যা = পঙ্কজ ইত্যাদি। এরূপ - গৃহস্থ, সত্যবাদী, ইন্দ্রজিৎ, ছেলেধরা, ধামাধরা, পকেটমার, পাতাচাটা, হাড়ভাঙ্গা, মাছিমারা, ছারপোকা, ঘরপোড়া, বর্ণচোরা, গলাকাটা, পা - চাটা, পাড়াবেড়ানি, ছা - পোষা ইত্যাদি।
If x: y =5:2 , then (8x+9y) : ( 8x +2y) is
Correct Answer:
A: 29:22
Explanation:
If x: y =5:2 , then (8x+9y) : ( 8x +2y) is Correct Answer 29:22 x/y = 5/2 Means x = 5, y = 2 Putting value of x and y in expression 8 × 5 + 9 × 2 = 58 8 × 5 + 2 × 2 = 44 58 : 44 = 29 : 22
'নালিটশটা অযৌক্তিক' - কোন ধরনের বাক্য?
Correct Answer:
খ: অস্তিবাচক
Explanation:
'নালিটশটা অযৌক্তিক' - কোন ধরনের বাক্য? সঠিক উত্তর অস্তিবাচক অস্তিবাচক বাক্য/ হাঁ বাচক বাক্য : যে বাক্যে সমর্থনের মাধ্যমে কোন কিছু বর্ণনা করা হয়, তাকে অস্তিবাচক বাক্য বা হাঁ বাচক বলে। যে বাক্যে হাঁ বাচক শব্দ থাকে, তাকে হাঁ বাচক বা অস্তিবাচক বাক্য বলে। যেমন - তুমি কালকে আসবে। আমি ঢাকা যাব। সদর্থক বা অস্তিবাচক বাক্য : এতে কোনো নির্দেশ, ঘটনার সংঘটন বা হওয়ার সংবাদ থাকে। যেমন : বিশ্বকাপে শ্রীলঙ্কা জিতেছে। আজ দোকানপাট বন্ধ থাকবে।
What is the amount of equal installment , if a sum of TK. 1428 due 2 years hence has to be completely has to be completely repaid in 2 equal annual installments starting next year?
Correct Answer:
D: cannot be determined
Explanation:
What is the amount of equal installment , if a sum of TK. 1428 due 2 years hence has to be completely has to be completely repaid in 2 equal annual installments starting next year? Correct Answer cannot be determined As short - cut of installment for 2 installments is given by Installment = P/{(100/100 + R) + (100/100 + R)2} There is the need of rate (R) which is unavailable in the question. So, we cannot determine the answer.
while working 7 hour a day , A alone can complete a piece of work in 6 days and B alone in 8 days . In what time would they complete it together , 8 hour a day?
Correct Answer:
B: 3 days
Explanation:
while working 7 hour a day , A alone can complete a piece of work in 6 days and B alone in 8 days . In what time would they complete it together , 8 hour a day? Correct Answer 3 days A can complete the work in 7*6 hrs = 42 hrs. A can complete in 1 hr = 1/42 part. B can complete the work in 7*8 hr = 56 hrs. A&B together do in 1 hr = 1/42 + 1/56 = 7/168 = 1/24 part. So they will do in 8 hrs = 8*1/24 = 1/3 part. Hence they need 1÷1/3 = 3 days to complete the work.
In a zoo, there are Rabbits and Pigeons. It heads are counted s, there are 200 and if legs are counted there are 580. How many pigeons are there ?
Correct Answer:
C: 110
Explanation:
In a zoo, there are Rabbits and Pigeons. It heads are counted s, there are 200 and if legs are counted there are 580. How many pigeons are there ? Correct Answer 110 Heads Count = 200 Legs count = 580 Average Legs count for per head = 580/200 = 29/10 Rabbits : Pigeons = 9/10: 11/10 = 9 : 11 Number of Pigeons = 200 × 11/20 = 110
'যে বন হিস্র জন্তুতে পরিপূর্ণ' এক কথায় কি হবে?
Correct Answer:
ঘ: শ্বাপদসংকুল
Explanation:
'যে বন হিস্র জন্তুতে পরিপূর্ণ' এক কথায় কি হবে? সঠিক উত্তর শ্বাপদসংকুল ”যে বন হিস্র জন্তুতে পরিপূর্ণ” - শ্বাপদসংকুল (Abounding with or infested with wild beasts)
The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is
Correct Answer:
B: 9.2 m
Explanation:
The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is Correct Answer 9.2 m Let AB be the wall and BC be the ladder. Height and Distance mcq solution image Then, ∠ACB = 60° = AC = 4.6m ACBC = cos60∘ = 12 ⇒ BC = 2 × AC = 2 × 4.6 = 9.2m
The headquarter of the Organization of Petroleum Exporting Countries is at -
Correct Answer:
B: Vienna
Explanation:
The headquarter of the Organization of Petroleum Exporting Countries is at - Correct Answer Vienna OPEC had its headquarters in Geneva, Switzerland, in the first five years of its existence. This was moved to Vienna, Austria, on September 1, 1965.
Two number are in the ratio 3:5 . If 9 is subtracted form each , the new numbers are in the ratio 1223. The smaller number is
Correct Answer:
B: 33
Explanation:
Two number are in the ratio 3:5 . If 9 is subtracted form each , the new numbers are in the ratio 1223. The smaller number is Correct Answer 33 Let the two numbers be 3x and 5x respectively. According to the given problem, (3x - 9)/(5x - 9) = 12/23 = > 23 × (3x - 9) = (5x - 9) × 12 = > 69x - 207 = 60x - 108 = >9x = 207 - 108 = >x = 99/9 = 11 Therefore, the two numbers are (3 × 11) = 33 and (5 × 11) = 55. The smaller number is 33.
P and O invested in a business. The profit earned was divided in the ratio 2 :3 . If P invested TK. 40000, the amount invested by Q is -
Correct Answer:
D: TK. 60000
Explanation:
P and O invested in a business. The profit earned was divided in the ratio 2 :3 . If P invested TK. 40000, the amount invested by Q is - Correct Answer TK. 60000 Let, the amount invested by Q = q. 40000:q = 2:3 ⇒40000q = 23 ⇒q = 40000 × 32 = Tk. 60000
The rocket launched from French carried how many satellites?
Correct Answer:
A: 4
Explanation:
The rocket launched from French carried how many satellites? Correct Answer 4 An Arianespace Soyuz rocket launches from French Guiana on April 4, 2019, carrying four communications satellites to orbit.
Two trains 105 meters and 90 meters long, run at the speeds of 45 km/h and 72 km/h respectively , in opposite directions on parallel tracks. The time which they take to cross each other , is :
Correct Answer:
D: 6 seconds
Explanation:
Two trains 105 meters and 90 meters long, run at the speeds of 45 km/h and 72 km/h respectively , in opposite directions on parallel tracks. The time which they take to cross each other , is : Correct Answer 6 seconds Length of the 1st train = 105 m Length of the 2nd train = 90 m Relative speed of the trains, = 45 + 72 = 117 kmph = (117 × 5)/18 = 32.5 m/sec Time taken to cross each other, = (Length of 1st train + length of 2nd train)/ relative speed of the trains ∴ Time taken = 195/32.5 = 6 secs.
For seeing objects at the surface of water from a submarine under water , the instrument used is -
Correct Answer:
A: Periscope
Explanation:
For seeing objects at the surface of water from a submarine under water , the instrument used is - Correct Answer Periscope For seeing objects at the surface of water from a submarine under water, the instrument used is periscope.
A bag contains 2 red, 3 green and 2 blue balls .Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
Correct Answer:
C: 10/21
Explanation:
A bag contains 2 red, 3 green and 2 blue balls .Two balls are drawn at random. What is the probability that none of the balls drawn is blue? Correct Answer 10/21 Total number of balls = (2 + 3 + 2) = 7 Let S be the sample space Then, n(S) = Number of ways of drawing 2 balls out of 7 n(S) = 7C2 n(S) = (7 × 6)/(2 × 1) n(S) = 21 Let E = Event of 2 balls, none of which is blue ∴ n(E) = Number of ways of drawing 2 balls out of (2 + 3) balls n(E) = 5C2 n(E) = (5 × 4)/(2 × 1) n(E) = 10 ∴P(E) = n(E)/n(S) = 10/21
The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance traveled downstream in 12 minutes is
Correct Answer:
B: 3.6 km
Explanation:
The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance traveled downstream in 12 minutes is Correct Answer 3.6 km Speed downstream = (15 + 3) kmph = 18 kmph Distance travelled = (18 × 12/60) km = 3.6 km
For galvanizing iron which of the following metal is used?
Correct Answer:
B: Zinc
Explanation:
For galvanizing iron which of the following metal is used? Correct Answer Zinc Zinc is used for galvanizing iron. Galvanization (or galvanizing as it is most commonly called in that industry) is the process of applying a protective zinc coating to steel or iron, to prevent rusting.
which one of the following numbers can be removed from the set S ={ 0, 2, 4,5.9) without changing the average of set S ?
Correct Answer:
B: 4
Explanation:
which one of the following numbers can be removed from the set S ={ 0, 2, 4,5.9) without changing the average of set S ? Correct Answer 4 The average of the elements in the original set S is: 0+2+4+5+95=205=4
A tank is filled in 5 hours by three pipes A,B and C The pipe C is twice as fast as B and B is twice as fast as A How much time will pipe A alone take to fill the tank?
Correct Answer:
C: 35 hours
Explanation:
A tank is filled in 5 hours by three pipes A,B and C The pipe C is twice as fast as B and B is twice as fast as A How much time will pipe A alone take to fill the tank? Correct Answer 35 hours Suppose pipe A alone takes x hours to fill the tank. Then, pipes B and C will take x/2 and x/4 hours respectively to fill the tank. ∴1/x + 2/x + 4/x = 1/5 ⇒7/x = 1/5 ⇒x = 35hours
Find the least number of five digits which when divided by 40, 60, and 75 , leave remainders 31 ,51 and 66 respectively .
Correct Answer:
D: 10191
Explanation:
Find the least number of five digits which when divided by 40, 60, and 75 , leave remainders 31 ,51 and 66 respectively . Correct Answer 10191 Difference, 40 - 31 = 9 60 - 51 = 9 75 - 66 = 9 Difference between numbers and remainder is same in each case. Then, The answer = {(LCM of 40, 60, 75) - 9} 40 = 2 × 2 × 2 × 5 60 = 2 × 2 × 3 × 5 75 = 3 × 5 × 5 LCM = 2 × 2 × 2 × 5 × 5 × 3 = 600 But, the least number of 5 digits = 10000 10000/600, we get remainder as 400 Then, the answer = 1000 - (600 - 400) - 9 = 10191
There is provision of food in fort for 1200 soldiers for 60 days .After 15 days . 200 soldiers leave the fort .Remaining food will last for how many days?
Correct Answer:
D: 54 days
Explanation:
There is provision of food in fort for 1200 soldiers for 60 days .After 15 days . 200 soldiers leave the fort .Remaining food will last for how many days? Correct Answer 54 days Work equivalence method: 1200 × 45 = 1000 × x Hence, x = 54 days Variation Method: After 15 days 200 soldiers left. Soldiers Food for days 1200 ↓ 45 1000 ↑ x (let) Arrows show the opposite variation to each other 1200/1000 = x/45 Or, x = (1200 × 45)/1000 = 54 days.
If 2 men or 3 women or 4 boys can do a piece of work in 52 days, then the same piece of work will be done by 1 man . 1 woman and 1 boy in -
Correct Answer:
A: 48 days
Explanation:
If 2 men or 3 women or 4 boys can do a piece of work in 52 days, then the same piece of work will be done by 1 man . 1 woman and 1 boy in - Correct Answer 48 days in one day 1 man do, (1/2) (1/52) work 1 woman do (1/3)(1/52) work 1 boy do (1/4) (1/52) work three do 1/52 (1/2 + 1/3 + 1/4) work. (1/52)(26/24) = 1/48 1 work is done in 48 days ans: 48 days
Study of life in outer space is known as -
Correct Answer:
D: exobiology
Explanation:
Study of life in outer space is known as - Correct Answer exobiology Study of life in outer space is known as exobiology. This branch of science deals with nature of possible life forms on other planets. It is understanding evolution, distribution, origin, and future of life beyond our Earth.
The first man-made satellite , Sputnik -I was launched by the former USSR in -
Correct Answer:
A: 1957
Explanation:
The first man-made satellite , Sputnik -I was launched by the former USSR in - Correct Answer 1957 In October 1957, the Soviet Union launched Sputnik 1, the world's first artificial satellite. The 184 - pound 22.5 - inch sphere orbited the earth once every 96 minutes. Sputnik transmitted radio signals for 21 days and later burned up in the earth's atmosphere.
Professor Amartya Sen is associated with -
Correct Answer:
B: Economics
Explanation:
Professor Amartya Sen is associated with - Correct Answer Economics Amartya Sen, (born November 3, 1933, Santiniketan, India), Indian economist who was awarded the 1998 Nobel Prize in Economic Sciences for his contributions to welfare economics and social choice theory and for his interest in the problems of society's poorest members. Born: November 3, 1933, Santiniketan Education: Presidency University, Trinity College Profession: Economist
which enables us to send the same letter to different person?
Correct Answer:
A: mail merge
Explanation:
which enables us to send the same letter to different person? Correct Answer mail merge যে সমস্ত উদ্ভিদ পানিতে বা পানি যুক্ত স্থানে জন্মে তাদেরকে জলজ উদ্ভিদ বলে। এসব জলজ উদ্ভিদ নদী - নালা, খাল - বিল, ডোবা - পুকুর, হ্রদ - জলাশয় ইত্যাদিতে প্রচুর পরিমাণে জন্মে। যেমন - করচ, হিজল, ডুমুর, জলকলমি, কচুরিপানা ইত্যাদি। গজারি মূলত বৃক্ষ জাতীয় উদ্ভিদ।এর অপর নাম শাল। গাছ কাটার পর গোড়া থেকে চারা গজানোর কারণে এর নাম গজারি হয়েছে মনে করা হয়। বাংলাদেশের ভাওয়াল ও মধুপুরের গাজারি বনই দেশের বৃহত্ পত্রঝরা বনাঞ্চল। লাল মাটির পাহাড়, ছোট ছোট টিলা জমিতে গজারি ভালো জন্মে।
The longest rail line of the world , Trans-Siberian line, is in -
Correct Answer:
C: Russia
Explanation:
The longest rail line of the world , Trans-Siberian line, is in - Correct Answer Russia The longest rail line of the world, Trans - Siberian line, is in Russia. The Trans - Siberian Railway is the longest railway line in the world, spanning 5,772 miles (9,289 kilometers) and connecting Moscow to Russia's far east.
Which of the following is an example of utility ?
Correct Answer:
D: Antivirus
Explanation:
Which of the following is an example of utility ? Correct Answer Antivirus Examples of common antivirus programs include Norton Antivirus, Kaspersky Anti - Virus, and ZoneAlarm Antivirus.