mathematics MCQs
Showing 50 questions (Total: 16798)
If A's salary is 30% more than B's then now percent is B's salary less than A's?
Correct Answer:
C: 761213
Explanation:
If A's salary is 30% more than B's then now percent is B's salary less than A's? Correct Answer 761213 A এর বেতন 130 টাকা হলে B এর বেতন 100 টাকাA এর বেতন 1 টাকা হলে B এর বেতন <math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mn>100</mn><mn>130</mn></mfrac></math> টাকা A এর বেতন 100 টাকা হলে B এর বেতন <math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>100</mn><mo>×</mo><mn>100</mn></mrow><mn>130</mn></mfrac></math>উত্তর: <math xmlns="http://www.w3.org/1998/Math/MathML"><mn>76</mn><mfrac><mn>12</mn><mn>13</mn></mfrac></math>
Which one is the complementary angle of 90°?
Correct Answer:
A: 0°
Explanation:
Which one is the complementary angle of 90°? Correct Answer 0&#xB0; - - - - - - - - গীর্জা, কামরা, পাদ্রি, গুদাম, আলমারী, চাবি, বালতি, পাউরুটি, আনারস, আতা, আচার, কাবাব, কেরানী, ইস্পাত, বাসন, আলকাতরা, আলপিন, ফিতা, সাবান, দরজা, জানালা, মার্কা এবং তোয়ালে পর্তুগীজ শব্দ। . ২. ফরাসি শব্দ: - - - - - - - - - - - - - কার্তুজ, কুপন, ক্যাফে, ডিপো, রেস্তোরাঁ, আঁশ ওলন্দাজ, শেমিজ, পাতি - এগুলো ফরাসি শব্দ। . ৩. তুর্কি শব্দ: - - - - - - - - - - - - বাবা, দারোগা, কুলি, লাশ, চাকু, বাবুর্চি , সুলতান, বন্দুক , বারুদ , চাকর, মুচলেকা, খাতুন ,বেগম, আলখেল্লা ইত্যাদি তুর্কি শব্দ। . ৪. ফারসি শব্দ: - - - - - - - - - - - - - খোদা, গুনাহ, দোজখ, নামাজ, পয়গম্বর। কারখান, চশমা, তারিখ, তোষক, দফতর। রোজা, ফেরেস্তা, ভেস্ত, দোকান, দরবার আমদানি, রফতানি, জিন্দা, জানোয়ার। নালিশ, বাদশাহ, বান্দা, দৌলাত। মেথর, নমুনা , দস্তখত। . ৫. আরবি শব্দ: - - - - - - - - - - - - - - - আল্লাহ, ইসলাম, ওজু, গোসল, কুরআন, হজ্জ, যাকাত, হারাম, হালাল, ঈমান। মোক্তার, রায়, জাহান্নাম, খারিজ, আদালত, উকিল, ওজর, এজলাস। আলেম, এলেম, গায়েব, কেচ্ছা, কিয়ামত। মুসাফির, ঈদ, ইসনান। কলম, কানুন, নগদ, বাকি, লোকসান। - - - - - ৬. পাঞ্জাবী শব্দ: তারকা, পাঞ্জাবী। - - - - - ৭. চীনা শব্দ: চা, চিনি, লিচু ও লুচি চীনা শব্দ। - - - ৮. বার্ম শব্দ: লুঙ্গি, ফুঙ্গি - - - - ৯. জাপানি শব্দ: হাসনাহেনা, ক্যারাটে, জুডো, রিকসা। - - - - ১০. গুজরাটি শব্দ: খদ্দর এবং হরতাল গুজরাটি শব্দ।
If the numerator of fraction is increased by 200% and the denominator is increased by 350% . The resultant fraction is 5/12 . what was the original fraction ?
Correct Answer:
B: 58
Explanation:
If the numerator of fraction is increased by 200% and the denominator is increased by 350% . The resultant fraction is 5/12 . what was the original fraction ? Correct Answer 58 Let numerator of the fraction is X and denominator is Y, then fraction will be X/Y.Numerator increased 200%, so new numerator would be,[X + (200 of X)/100] = 3X - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (1)New denominator,[Y + (350Y)/100 ] = 45Y/10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (2)Now, accordibng to question,3X /(45Y/10) = 5/1230X / 45Y = 5/12360X = 225YX/Y = 225/360X/Y = 5/8So, Original fraction was 5/8.
Aalm sold tow vehicles for Tk. 46000 each . If he gained 10% on the first and lost 10% on another , then what is his percentage profit or loss in this transaction ?
Correct Answer:
C: 1 % loss
Explanation:
Aalm sold tow vehicles for Tk. 46000 each . If he gained 10% on the first and lost 10% on another , then what is his percentage profit or loss in this transaction ? Correct Answer 1 % loss In the case where loss and gain percentage is common on same selling price, always a loss incurs in total deal. And this can be calculated by a short - cut: Loss on total deal, = (Common loss or gain percentage/10)^2 = (10/10)^2 = 1%
The profit earned after selling an article for Tk. 3,362 is the same as the loss incurred after selling the article for Tk. 2,36. At what selling price will a trader make a 20% profit on this article?
Correct Answer:
D: None of these
Explanation:
The profit earned after selling an article for Tk. 3,362 is the same as the loss incurred after selling the article for Tk. 2,36. At what selling price will a trader make a 20% profit on this article? Correct Answer None of these Let the cost price of the article be Tk. x.∴ 3362 − x = x − 2346 ∴ x = C.P. = 3362 + 2346 = 2,854/ - 2 ∴ S.P. corresponding to a 20% profit = 1.2 × 2854 = Tk. 3,424.8/ - Hence, option D is correct.
In a mixture, the ratio of the milk and water is 6 : 5. when 22 liter mixture is replaced by water, the ratio becomes 9 : 13. Find the quantity of water after replacement.
Correct Answer:
D: 52 liter
Explanation:
In a mixture, the ratio of the milk and water is 6 : 5. when 22 liter mixture is replaced by water, the ratio becomes 9 : 13. Find the quantity of water after replacement. Correct Answer 52 liter Correct Option: DLet milk = 6x, water = 5xAccording to the question, 6x – 22 × 6 : 5x – 22 × 5 + 22 = 9 : 13 11 11 6x – 12 : 5x – 10 + 22 = 9 : 1313 (6x – 12) = 9 (5x + 12)78x – 156 = 45x + 10878x – 45x = 156 + 10833x = 264x = 8Water after replacement = 5 × 8 – 10 + 22 = 40 + 22 = 52 litreHence, option D is correct.
A man can reach a certain place in 40 hours . If he reduces his speed by 1/15th, he goes 5 km less in that time . Find the total distance covered by him.
Correct Answer:
D: 75 km .
Explanation:
A man can reach a certain place in 40 hours . If he reduces his speed by 1/15th, he goes 5 km less in that time . Find the total distance covered by him. Correct Answer 75 km . Correct Option: DLet Distance = D km, Speed = S km/h Time = Distance Speed 40 = Distance .... (1) Speed After reducing speed, Distance = Distance – 5 km, Speed = S × 14 km/h 15 Time = Distance Speed 40 = (Distance – 5) .... (2) Speed × 14 15 After solving equation 1 and 2 Distance = (Distance – 5) Speed Speed × 14 15 14 Distance = 15 (Distance – 5)14 Distance = 15 Distance – 75Distance = 75 km.Hence, option D is correct.
An article costs Tk. 500 and the marked price is mentioned as Tk. 800. What is the profit % for the seller it he sells and offers a discount of 10% on the marked price ?
Correct Answer:
B: 44%
Explanation:
An article costs Tk. 500 and the marked price is mentioned as Tk. 800. What is the profit % for the seller it he sells and offers a discount of 10% on the marked price ? Correct Answer 44% 10% of 800 = 800x10/100 = 80 Profit = (800 - 80) - 500 = 720 - 500 = 220 So, the profit % = (220x100)/500 = 44%
If x=-1 which of the following is the largest/
Correct Answer:
D: x2
Explanation:
If x=-1 which of the following is the largest/ Correct Answer x2 ১. পর্তুগীজ শব্দ: - - - - - - - - গীর্জা, কামরা, পাদ্রি, গুদাম, আলমারী, চাবি, বালতি, পাউরুটি, আনারস, আতা, আচার, কাবাব, কেরানী, ইস্পাত, বাসন, আলকাতরা, আলপিন, ফিতা, সাবান, দরজা, জানালা, মার্কা এবং তোয়ালে পর্তুগীজ শব্দ। . ২. ফরাসি শব্দ: - - - - - - - - - - - - - কার্তুজ, কুপন, ক্যাফে, ডিপো, রেস্তোরাঁ, আঁশ ওলন্দাজ, শেমিজ, পাতি - এগুলো ফরাসি শব্দ। . ৩. তুর্কি শব্দ: - - - - - - - - - - - - বাবা, দারোগা, কুলি, লাশ, চাকু, বাবুর্চি , সুলতান, বন্দুক , বারুদ , চাকর, মুচলেকা, খাতুন ,বেগম, আলখেল্লা ইত্যাদি তুর্কি শব্দ। . ৪. ফারসি শব্দ: - - - - - - - - - - - - - খোদা, গুনাহ, দোজখ, নামাজ, পয়গম্বর। কারখান, চশমা, তারিখ, তোষক, দফতর। রোজা, ফেরেস্তা, ভেস্ত, দোকান, দরবার আমদানি, রফতানি, জিন্দা, জানোয়ার। নালিশ, বাদশাহ, বান্দা, দৌলাত। মেথর, নমুনা , দস্তখত। . ৫. আরবি শব্দ: - - - - - - - - - - - - - - - আল্লাহ, ইসলাম, ওজু, গোসল, কুরআন, হজ্জ, যাকাত, হারাম, হালাল, ঈমান। মোক্তার, রায়, জাহান্নাম, খারিজ, আদালত, উকিল, ওজর, এজলাস। আলেম, এলেম, গায়েব, কেচ্ছা, কিয়ামত। মুসাফির, ঈদ, ইসনান। কলম, কানুন, নগদ, বাকি, লোকসান। - - - - - ৬. পাঞ্জাবী শব্দ: তারকা, পাঞ্জাবী। - - - - - ৭. চীনা শব্দ: চা, চিনি, লিচু ও লুচি চীনা শব্দ। - - - ৮. বার্ম শব্দ: লুঙ্গি, ফুঙ্গি - - - - ৯. জাপানি শব্দ: হাসনাহেনা, ক্যারাটে, জুডো, রিকসা। - - - - ১০. গুজরাটি শব্দ: খদ্দর এবং হরতাল গুজরাটি শব্দ।
The average of the first and the second of three numbers is 15 more than the average of the second and the third of these numbers .what is the difference between the first and the third of these three numbers?
Correct Answer:
D: None of these
Explanation:
The average of the first and the second of three numbers is 15 more than the average of the second and the third of these numbers .what is the difference between the first and the third of these three numbers? Correct Answer None of these Let Ist no = x 2nd no = y 3rd no = z According to Q. (x + y)/2 = 15 + (y + z)/2 Multiply above equation by 2 x + y = 30 + y + z So, x - z = 30 Difference of Ist & 3rd no is 30.
A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article . Find his profit percent if the article is sold at marked price allowing no discount .
Correct Answer:
A: 30%
Explanation:
A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article . Find his profit percent if the article is sold at marked price allowing no discount . Correct Answer 30% Let the cost price = Tk.100 Therefore, Selling price = 100×117100 = Tk.117100×117100 = Tk.117 Therefore, Marked price = 117×10090 = 130117×10090 = 130 Therefore, Profit Percentage = (130−100)100×100 = 30%
একটি সংখ্যার ৫ গুণের সাথে ২ গুণ যোগ করলে ৩৫ হয়, সংখ্যাটি কত?
Correct Answer:
ক: ৫
Explanation:
একটি সংখ্যার ৫ গুণের সাথে ২ গুণ যোগ করলে ৩৫ হয়, সংখ্যাটি কত? সঠিক উত্তর ৫ মাত্রাবৃত্ত ছন্দ (কলাবৃত্ত বা ধ্বনিপ্রধান ছন্দ) বাংলা সাহিত্যে প্রচলিত প্রধান তিনটি ছন্দের একটি। অন্য দুটি হলো স্বরবৃত্ত ছন্দ এবং অক্ষরবৃত্ত ছন্দ। মাত্রাবৃত্ত ছন্দে লেখা কবিতাগুলোর মূলপর্ব ৪, ৫, ৬, ৭ মাত্রার হতে পারে।
১৭+১৪= কত?
Correct Answer:
গ: ৬৯৪
Explanation:
১৭+১৪= কত? সঠিক উত্তর &#x9EC;&#x9EF;&#x9EA; শাহনামা অথবা শাহ্ - নামা (ফার্সি: شاهنامه Šāhnāmeh, "রাজাদের বই") পারস্যের (বর্তমান ইরান) কবি ফেরদৌসী দ্বারা লিখিত একটি দীর্ঘ মহাকাব্য। এটি একই সাথে ইরানের ও সারা বিশ্বের ফার্সি ভাষাভাষী লোকদের জন্য জাতীয় মহাকাব্য। ফেরদৌসী ৯৭৭ থেকে ১০১০ সালের মধ্যে ৩০ বছরের অধিক সময় ধরে এই মহাকাব্য রচনা করেন। লিখেছেন: ৯৭৭ – ১০১০ খ্রিষ্টাব্দ বিষয়: পারস্য পুরাণ, ইরানের ইতিহাস মূল শিরোনাম: شاهنامه লাইন: ৫০,০০০ (পাণ্ডুলিপি অনুসারে)
an.am-n=?
Correct Answer:
A: am
Explanation:
an.am-n=? Correct Answer am সেলিম আল দীনের প্রথমদিককার নাটকের মধ্যে সর্প বিষয়ক গল্প, জন্ডিস ও বিবিধ বেলুন, এক্সপ্লোসিভ ওমূল সমস্যা, এগুলোর নাম ঘুরে ফিরে আসে। সেই সঙ্গে প্রাচ্য, কীত্তনখোলা, বাসন, আততায়ী, সয়ফুল মুলক বদিউজ্জামান, কেরামত মঙ্গল, হাত হদাই, যৈবতী কন্যার মন, মুনতাসির ফ্যান্টাসি ও চাকা তাকে ব্যতিক্রমধর্মী নাট্যকার হিসেবে পরিচিত করে তোলে।
কোনটি বড়?
Correct Answer:
গ: ৪৫
Explanation:
কোনটি বড়? সঠিক উত্তর &#x9EA;&#x9EB; ১৮০১ সালের ৪ মে রামরাম বসু ফোর্ট উইলিয়াম কলেজের বাংলা বিভাগে দ্বিতীয় পণ্ডিতির পদে মাসিক ৪০ টাকা বেতনে নিযুক্ত হন। তিনি "লিপিমালা" নামে একটি গ্রন্থ রচনা করেছিলেন যা ১৮০২ সনে শ্রীরামপুর থেকে প্রকাশিত হয়।
(7+7)2=?
Correct Answer:
C: 28
30 pens and 75 pencils altogether were purchased for Tk. 510 . If the average price of a pencil was Tk. 2 , what was the average price of a pen ?
Correct Answer:
D: Tk. 12
Explanation:
30 pens and 75 pencils altogether were purchased for Tk. 510 . If the average price of a pencil was Tk. 2 , what was the average price of a pen ? Correct Answer Tk. 12 According to the question, 30 pens + 75 pencils = Tk. 510 Average price of a pencil = Tk. 2 Price of 75 pencils = 2 × 75 = Tk. 150 ∴ Price of 30 pens = 510 - 150 = Tk. 360 ∴ Average price of pen = 360/30 = Tk. 12
A picnic attracts 240 persons. There are 20 more men than women and 20 more adults than children . How many men are at this picnic?
Correct Answer:
B: 75
A boat travel with a speed of 10 km / hr in still water. If the speed of the stream is 3 km / hr then find time taken by boat to travel 52 km downstream .
Correct Answer:
B: 4hrs
Explanation:
A boat travel with a speed of 10 km / hr in still water. If the speed of the stream is 3 km / hr then find time taken by boat to travel 52 km downstream . Correct Answer 4hrs Speed downstream = (10 + 3) km/hr = 13 km/hr Time taken to travel 52 km downstream = 52/13 hours = 4 hours
which one of the following fractions is closest to 14?
Correct Answer:
D: 415
Shonghoti and Shouhardo Clubs consist of 200 and 270 members respectively. If the total member of the two clubs is 420 then how many members belong to both clubs?
Correct Answer:
C: 50
Explanation:
Shonghoti and Shouhardo Clubs consist of 200 and 270 members respectively. If the total member of the two clubs is 420 then how many members belong to both clubs? Correct Answer 50 We know, Total = N(A) + N(B) - N(A∩B) + None. ⇒ 420 = 200 + 270 - N(A∩B) + 0 ⇒ N(A∩B) = 470 - 420 ⸫ N(A∩B) = 50
If x3<x2<x then the value of x could be
Correct Answer:
B: 1/3
How many hours will it take a man to travel M miles at miles at the rate of H miles per hour?
Correct Answer:
C: M/H
Which of the following equations is not equivalent to 25x2=y2-4
Correct Answer:
D: 5x=y-2
The area of a rhombus is 96 sq. cm and the length of one of the diagonals is 16 cm. The length of the other diagonal is __
Correct Answer:
B: 12
Explanation:
The area of a rhombus is 96 sq. cm and the length of one of the diagonals is 16 cm. The length of the other diagonal is __ Correct Answer 12 The length of the other diagonal is x. We know, Area = 1/2 * One diagonal * other diogonalSo, 1/2 *16*x = 96x = 16.
A train passes a platform in 40 sec and a woman standing on the platform in 30 sec . the speed of the train is 108 km / hr, what is the length of the platform ?
Correct Answer:
B: 300 m
A train 125 m long passes a person , running at 8 km / hr in the same direction in which the train is going in 25 seconds . The speed of the train is :
Correct Answer:
D: 26
Explanation:
A train 125 m long passes a person , running at 8 km / hr in the same direction in which the train is going in 25 seconds . The speed of the train is : Correct Answer 26 Speed of the train relative to man = (125/25) m/sec = 5 m/sec. [5 x (18/5)] km/hr = 18 km/hr. Let the speed of the train be 'S' km/hr. Then, relative speed = (S - 8) km/hr. S - 8 = 18 = > S = 26 km/hr.
If S to be served on Thursday, which of the following is true?
Correct Answer:
D: R must be served on Wednesday
if (x-1)2=400, Which of the following could be the value of x-5?
Correct Answer:
C: -24
what is the simplified value of (a4b3)2?
Correct Answer:
B: a8b6
If 3 / (x-1) = 2/(x+1), what is the value of x ?
Correct Answer:
A: -5
What will be the difference in taka between simple and compound interest at 10% on a sum of TK. 1000 after 4 years?
Correct Answer:
D: 64. 10
The ratio of the speed of boat in still water to the speed of stream is 16 : 5. A boat goes 16.5 km in 45 minute upstream , find the time taken by boat to cover the distance of 17.5 km downstream .
Correct Answer:
B: 25minutes
Explanation:
The ratio of the speed of boat in still water to the speed of stream is 16 : 5. A boat goes 16.5 km in 45 minute upstream , find the time taken by boat to cover the distance of 17.5 km downstream . Correct Answer 25minutes Correct Option: BLet the speed of boat in still water = 16x, speed of stream = 5xUpstream speed = 16x – 5x = 11x S = D t 11x = 16.5 × 60 45 x = 2speed of boat in still water = 32 km/h, speed of stream = 10 km/hDownstream speed = 32 + 10 = 42 km/h Distance = 17.5 km time = 17.5 42 = 5 hour 12 or 5 × 60 = 25 minutes 12 Hence, option B is correct.
A train running at 36 kmph passes another train completely in 12 sec, which is half of its length, running in the opposite direction at 54 kmph. If it also passes a railway platform in 1.5m, what is the length of the platform (in meters)?
Correct Answer:
A: 700
Explanation:
A train running at 36 kmph passes another train completely in 12 sec, which is half of its length, running in the opposite direction at 54 kmph. If it also passes a railway platform in 1.5m, what is the length of the platform (in meters)? Correct Answer 700 The 6th number is = (50 × 9) – (5 × 54 + 3 × 52) = 450 – 426 = 24. Ans: D
A number is as much greater than 36 as is less than 86 . Find the number.
Correct Answer:
C: 61
Explanation:
A number is as much greater than 36 as is less than 86 . Find the number. Correct Answer 61 A number is as much greater than 36 as is less than 86 . Find the number. ATQ, x = (36 + 86)/2 = 122/2 = 61
If three boys can paint a wall in 2 days , what part of the job can be completed by two boys in 1 day ?
Correct Answer:
A: 1/3
If x =ya, y =zb then abc is __
Correct Answer:
A: 1
Explanation:
If x =ya, y =zb then abc is __ Correct Answer 1 এখানে,z = xc⇒z = yac [⸪x = ya⇒z = zbac[⸪y = zb]⇒z1 = zabc
A can do a piece of work in 10 days, B can do the same in 30 days and C in 60 days. If A is assisted on alternate days by B and C, in how many days would the work get completed?
Correct Answer:
D: 8
Explanation:
A can do a piece of work in 10 days, B can do the same in 30 days and C in 60 days. If A is assisted on alternate days by B and C, in how many days would the work get completed? Correct Answer 8 Average of 12 innings = x According to the question: (12x + 96)/13 = x + 5 x = 96 - 65 = 31. Average in 13 innings = 31 + 5 = 36 Ans: A
The one - third of the complementary angle to 60° is __
Correct Answer:
D: 10°
Explanation:
The one - third of the complementary angle to 60° is __ Correct Answer 10&#xB0; Complementary angle of 6০0 is (9০ - 6০) = 3০0⸫ One third of 3০0 = 1/3×3০0 = 1০0
If A can do 1 /4 of a work in 3 days and B can do 1 /6 of the same work in 4 days , how much will A get if both work together and are paid Tk. 180 in all ?
Correct Answer:
B: Tk. 120
Explanation:
If A can do 1 /4 of a work in 3 days and B can do 1 /6 of the same work in 4 days , how much will A get if both work together and are paid Tk. 180 in all ? Correct Answer Tk. 120 A 3 days = 1/4 of a work :. 1 day = 1/12 B 4 days = 1/6 of a work :. 1 day = 1/24 In terms of ration A :B 2x : x = 180 120 : 60 A will get = Tk. 120
7 in 5 percent of what number ?
Correct Answer:
B: 140
An amount of money becomes Tk. 1,860 at an interest rate of 8% in 3 years. How many years the money would take to become Tk. 2040 at the same interest rate?
Correct Answer:
A: 412
Explanation:
An amount of money becomes Tk. 1,860 at an interest rate of 8% in 3 years. How many years the money would take to become Tk. 2040 at the same interest rate? Correct Answer 412 Let, principal = x X + x*.08*3 = 1860 #1.24x = 1860 #X = 1500 Let, time = Y #1500 + 1500*y*.08 = 2040 #120y = 540 #y = 4.5
3-3 এর মান নিচের কোনটি?
Correct Answer:
ঘ: 1/27
If 42x+1=32, then x =?
Correct Answer:
C: 34
Explanation:
If 42x+1=32, then x =? Correct Answer 34 42x + 1 = 32⇒(22)2x + 1 = 25⇒24x + 2 = 25⇒4x + 2 = 5⇒4x = 3⸫x = 34
The simple interest on a certain sum of money at 4 percent per annum for 4 years is TK. 87.5 more than interest on the same sum for 3 years at 5 percent per annum. Find the sum of money.
Correct Answer:
C: TK. 8,750
Explanation:
The simple interest on a certain sum of money at 4 percent per annum for 4 years is TK. 87.5 more than interest on the same sum for 3 years at 5 percent per annum. Find the sum of money. Correct Answer TK. 8,750 Speed of the first train = 150/15 = 10 mps. speed of the second train = x mps. According to the question: x + 10 = (150 + 150)/8 x = 27.5 mps = 27.5 × 3600/1000 = 99 kmph. Ans: D
The ratio of two numbers is 3 : 4 and their sum is 630 . The smaller one of the numbers is __
Correct Answer:
B: 270
Explanation:
The ratio of two numbers is 3 : 4 and their sum is 630 . The smaller one of the numbers is __ Correct Answer 270 Let the two numbers are 3x and 4xSum of two numbers = 3x + 4x = 7xnow, 7x = 630or, x = 90so the smoller number = 3x = 3*90 = 270
A train 240 m long passed a pole in 24 seconds . How long will it take to pass a platform 650 m long ? __
Correct Answer:
B: 89 s
Explanation:
A train 240 m long passed a pole in 24 seconds . How long will it take to pass a platform 650 m long ? __ Correct Answer 89 s ট্রেনের বেগ = 24024 = 10ms - 1⸫ 10m অতিক্রম করে 1 সেকেন্ডে⸫ 1 ,, ,, ,, 110 ,,⸫ (650 + 240) বা 890 অতিক্রম করে 89010সেকেন্ডে = 89 সেকেন্ডে।
4n=64 হলে n এর মান নিচের কোনটি হবে?
Correct Answer:
খ: 3
One number is 3 more that 2 times of another number . Their sum is 21 . Find the numbers.
Correct Answer:
C: 6,15
Sum of 4 consecutive even numbers is greater than consecutive odd numbers by 81. If the sum of the least odd and even numbers is 59 then find the sum of largest odd and even numbers.
Correct Answer:
A: 69
Explanation:
Sum of 4 consecutive even numbers is greater than consecutive odd numbers by 81. If the sum of the least odd and even numbers is 59 then find the sum of largest odd and even numbers. Correct Answer 69 Let 4 consecutive even numbers be x, x + 2, X + 4 and x + 6 respectively. 3 consecutive odd numbers be y, y + 2 and y + 4 According to question, [x + x + 2 + x + 4 + x + 6]−[y + y + 2 + y + 4] = 81 = > (4x + 12)−(3y + 6) = 81 4x−3y = 81−12 + 6 4x−3y = 75 x + 4 = 59 On solving equations (i) and (ii), we get X = 36 y = 23 The sum of largest odd and even number = x + 6 + y + 4 = x + y + 10 = 36 + 23 + 10 = 69