mathematics MCQs
Showing 50 questions (Total: 16798)
If x and y are integers and -9
Correct Answer:
B: 21
Explanation:
If x and y are integers and -9 Correct Answer 21 Hints: ( y - x) এর সর্বোচ্চ মান হবে y এর সর্বোচ্চ মান এবং x এর সর্বনিম্ন মানের বিয়োগফলের সমান। সুতরাং, y - x = 13 - ( - 8) = 13 + 8 = 21
Two numbers are in the ratio 5:4 and their difference is 10. What is the largest number?
Correct Answer:
C: 50
Explanation:
Two numbers are in the ratio 5:4 and their difference is 10. What is the largest number? Correct Answer 50 Hints: ধরি, সংখ্যা দুটি 5x ও 4x 5x - 4x = 10 x = 10 বড় সংখ্যাটি = 5x = 5×10 = 50
How many degrees are included between the hands of a clock at 4.00?
Correct Answer:
D: 120 degree
Explanation:
How many degrees are included between the hands of a clock at 4.00? Correct Answer 120 degree ব্যাখাঃ ঘড়ির ঘন্টা ও মিনিটের কাঁটার মধ্যবর্তী কোণ = | 11M - 60h /2 | = | 11×0 - 60×4 /2 | = | - 240/2| = 1200
X number of students in a class agreed to donate a total of Tk. Z to a charity. If 4 students drop out, how much more will each of the rest have to contribute so that the total donation remains the same?
Correct Answer:
B: 4Z/(X2-4X)
Explanation:
X number of students in a class agreed to donate a total of Tk. Z to a charity. If 4 students drop out, how much more will each of the rest have to contribute so that the total donation remains the same? Correct Answer 4Z/(X2-4X) ব্যাখাঃ x শিক্ষার্থীর প্রত্যেকে চাঁদা দেয় z/x টাকা (x - 4) শিক্ষার্থী প্রত্যকে চাঁদা দেয় = z/ x - 4 টাকা বেশি চাদার পরিমান = z/x - 4 - z/x = 4z / x2 - 4x
A box contains m number of chocolates. After distributing the chocolates equally among 16 students you are left with 6 chocolates. Which of the following must be true?
Correct Answer:
B: m-2 is divisible by 4
Explanation:
A box contains m number of chocolates. After distributing the chocolates equally among 16 students you are left with 6 chocolates. Which of the following must be true? Correct Answer m-2 is divisible by 4 ব্যাখাঃ মোট চকলেটের সংখ্যা হবে ( ১৬ এর গুনিতক + ৬) অর্থাৎ সংখ্যাটি ২২, ৩৮, ৫৪ প্রভৃতি হতে পারে। এখন, ২২ + ৪ = ২৬ যা দ্বারা ৮ বিভাজ্য নয় ২২ + ৬ = ২৮ যা দ্বারা ৮ বিভাজ্য নয় ২২ - ২ = ২০ যা ৪ দ্বারা বিভাজ্য নয়
If 2x-3 is an odd integer, find the next even integer.
Correct Answer:
C: 2x-2
Explanation:
If 2x-3 is an odd integer, find the next even integer. Correct Answer 2x-2 Hints: পরের Even integer হবে ( 2x - 3 + 1) = 2x - 2
Which of the following equations can be used to find the value of if 8 more than 9x is 3 times the sum of 6 and x?
Correct Answer:
C: 9x+8=3 (x+6)
Explanation:
Which of the following equations can be used to find the value of if 8 more than 9x is 3 times the sum of 6 and x? Correct Answer 9x+8=3 (x+6) Hints: শর্তানুসারে , 3 ( 6 + x) - 8 = 9x 9x + 8 = 3 ( 6 + x)
If x and y are integers and k=32y+15, which of the following must be an odd integen
Correct Answer:
C: x+2y
Explanation:
If x and y are integers and k=32y+15, which of the following must be an odd integen Correct Answer x+2y Hints: x = 32y + 15 এখানে y এর জোড় বা বিজোড় যাই হোক না কেন 32 y অবশ্যাই জোড়। (32y + 15) অবশ্যাই বিজোড় ( x + 2y) অবশ্যাই একটি বিজোড় সংখ্যা
42 is what percent of 70?
Correct Answer:
B: 60%
Explanation:
42 is what percent of 70? Correct Answer 60% Hints: 42, 70 এর ( 42/70 × 100) % = 60%
At present Lili is 23 years old and Medrin is 15 years old. How many years ago was Lili twice as old as Mehrin?
Correct Answer:
A: 7
Explanation:
At present Lili is 23 years old and Medrin is 15 years old. How many years ago was Lili twice as old as Mehrin? Correct Answer 7 Hints: ধরি, x বছর পূর্বে লিলির বয়স মিলির বয়সের দ্বিগুন ছিলো । ( 23 - x) = 2 ( 15 - x) 23 - x = 30 - 2x 2x - x = 30 - 23 x = 7
If x and y are negative integers and x-y=1, which is the least possible value for xy?
Correct Answer:
B: 2
Explanation:
If x and y are negative integers and x-y=1, which is the least possible value for xy? Correct Answer 2 ব্যাখাঃ যেহেতু, x ও y ঋণাত্মক পূর্ণসংখ্যা এবং x - y = 1 অর্থাৎ x > y x = - 1 এবং y = - 2 হলে xy = ( - 1)( - 2) = 2
A school has a total enrollment of 9- students. There are 30 students taking Physics, 25 taking English, and 13 taking both. What percentage of the students are taking either Physics or English?
Correct Answer:
C: 47%
Explanation:
A school has a total enrollment of 9- students. There are 30 students taking Physics, 25 taking English, and 13 taking both. What percentage of the students are taking either Physics or English? Correct Answer 47% ২০১৫ সালে একুশে পদক লাভ করেন ১৫ জন। প্রতি বছর ভাষা আন্দোলন, মুক্তিযুদ্ধ, ভাষা ও সাহিত্য, শিল্পকলা, শিক্ষা, গবেষণা, সাংবাদিকতা, গণমাধ্যম ও সমাজসেবার ক্ষেত্রে অবদানের স্বীকৃতিস্বররূপ এ পুরস্কার প্রদান করা হয়। ২০১৮ সালে এ পুরস্কার পায় ২১ জন বিশিষ্ট নাগরিক।
If y=3x and z =2y, then in terms of x, x+y+z=
Correct Answer:
A: 10x
Explanation:
If y=3x and z =2y, then in terms of x, x+y+z= Correct Answer 10x X + y + z = x + 3x + 2y = x + 3x + 2 × 3x = 10x
52.68*1/100=
Correct Answer:
B: 0.5268
Explanation:
52.68*1/100= Correct Answer 0.5268 52.68/100 = 5268/100*100 = .5268
What is the remainder when 63 is divided by 8?
Correct Answer:
B: 3
Explanation:
What is the remainder when 63 is divided by 8? Correct Answer 3 Hints : 63/8 = ( 6×6×6) / 8 = 3×3×3 = 27 ভাগশেষ = 0
If 4% of (P+Q) is 8 and P is a positive integer, what is the greatest possible value of Q?
Correct Answer:
D: 199
Explanation:
If 4% of (P+Q) is 8 and P is a positive integer, what is the greatest possible value of Q? Correct Answer 199 বর্তমানে বিশ্বের মোট স্বাধীন দেশের সংখ্যা ১৯৫। তন্মধ্যে ১৯৩ টি দেশ জাতিসংঘের সদস্য হওয়ার মর্য়াদা লাভ করেছে। আর দুটি দেশ ভ্যাটিকান সিটি ও ফিলিস্তিন জাতিসংঘের সদস্য নয়; তারা এ সংস্থাটির পর্যবেক্ষক দেশ।
A train covers a distance of 10 km in 12 minutes. If its speed is decreased by 5 km/hr, the time taken by it to cover the same distance will be :
Correct Answer:
A: 13 min 20 sec
Explanation:
A train covers a distance of 10 km in 12 minutes. If its speed is decreased by 5 km/hr, the time taken by it to cover the same distance will be : Correct Answer 13 min 20 sec Hints: speed of the train = distance / time = 10 / ( 12/60) = 10× 60 / 12 = 50 km/h Now speed = 45 km/h Required time = 10 / 45 hour = (2× 60)/ 9 = 40 /30 minutes = 13 minutes 20 second
An amount of 320 is divided among A, B and C such that A receives 30 more than B and C receives 20 more than A. How much does C receive?
Correct Answer:
A: 130
Explanation:
An amount of 320 is divided among A, B and C such that A receives 30 more than B and C receives 20 more than A. How much does C receive? Correct Answer 130 ব্যাখাঃ ধরি, B পায় x টাকা A পায় (x + 30) টাকা
30 labourers, working 7 hours a day can finish a piece of work in 18 days. If the ladourers work 6 hours a day, then the number of labourers to finish the same piece of work in 30 days, will be.
Correct Answer:
C: 21
Explanation:
30 labourers, working 7 hours a day can finish a piece of work in 18 days. If the ladourers work 6 hours a day, then the number of labourers to finish the same piece of work in 30 days, will be. Correct Answer 21 In 18 days working 7 hours a day can finish 30 labours In 30 days working 6 hours a day can finish = ( 18×30×7)/ ( 30×6) = 21
A school district has 1,989 computers, which is approximately one computer for every 68.6 students. Of the following, which is the closest approximation, in thousands, of the number of students in the school district?
Correct Answer:
C: 140
Explanation:
A school district has 1,989 computers, which is approximately one computer for every 68.6 students. Of the following, which is the closest approximation, in thousands, of the number of students in the school district? Correct Answer 140 Hints: 1 টি কম্পিউটার ব্যবহার করে 68.6 জন 1989 টি কম্পিউটার ব্যবহার করে ( 1989×68.6) জন = 1, 36, 445.4 জন যেহেতু কাছাকাছি মান চাওয়া হয়েছে সেহেতু অপশন অনুযায়ী 140 সঠিক উত্তর
If a and b are positive real numbers then (a degree -3b degree)5=?
Correct Answer:
B: -32
Explanation:
If a and b are positive real numbers then (a degree -3b degree)5=? Correct Answer -32 ব্যাখাঃ ( a0 - 3b0) 5 = ( 1 - 3 × 1) 5 = ( 1 - 3) 5 = ( - 2) 5 = - 32
In a solution of 60 litre of suger and water, 20% is sugar. How much water (In litre) must be added to make a solution that is 8% sugar?
Correct Answer:
C: 90
Explanation:
In a solution of 60 litre of suger and water, 20% is sugar. How much water (In litre) must be added to make a solution that is 8% sugar? Correct Answer 90 Hints: চিনির পরিমান ৬০ × ১২০ /১০০ = ১২ মিলিগ্রাম
Siam needs m minutes to do a task. After he works for k minutes, what part of the task remains incomplete?
Correct Answer:
C: (m-k)/m
Explanation:
Siam needs m minutes to do a task. After he works for k minutes, what part of the task remains incomplete? Correct Answer (m-k)/m ব্যাখাঃ
If 6x-4=5x+3, then x=
Correct Answer:
D: 7
Explanation:
If 6x-4=5x+3, then x= Correct Answer 7 ব্যখাঃ 6x - 4 = 5x + 3 6x - 5x = 3 + 4 x = 7
Taraq drives from city A to B at 40 km per hour and returns over the same road at 30 km per hour and spends 8 hours away from home including a one-hcur stop for lunch. What is the distance (in km) between city A and city B?
Correct Answer:
B: 120
Explanation:
Taraq drives from city A to B at 40 km per hour and returns over the same road at 30 km per hour and spends 8 hours away from home including a one-hcur stop for lunch. What is the distance (in km) between city A and city B? Correct Answer 120 ব্যাখাঃ
If (x2-4)(4/x-5)=0, then x=?
Correct Answer:
D: 4/5
Explanation:
If (x2-4)(4/x-5)=0, then x=? Correct Answer 4/5 FTP এমন একটি পদ্ধতি যার মাধ্যমে ইন্টারনেট ব্যবহার করে এক কম্পিউটার থেকে অন্য কম্পিউারে ফাইল পাঠানো হয়। FTP এর পূর্ণরূপ হলো File Transfer Protocol।
One fourth the price of a TV is equal to 1/6th the price of a refrigerator. If the total cost of the TV and the refrigerator is Tk 60000, what is the price of the TV?
Correct Answer:
B: Tk 24000
Explanation:
One fourth the price of a TV is equal to 1/6th the price of a refrigerator. If the total cost of the TV and the refrigerator is Tk 60000, what is the price of the TV? Correct Answer Tk 24000 Hints: ধরি, TV এর মূল্য x টাকা রেফ্রিজারেটর এর মূল্য ( 60000 - x) টাকা শর্তমতে, x/4 = ( 60000 - x) / 6 6x = 240000 - 4x 6x + 4x = 240000 x = 24000
The difference between the local value and the face value of 7 in the numeral 32675149 is
Correct Answer:
A: 69993
Explanation:
The difference between the local value and the face value of 7 in the numeral 32675149 is Correct Answer 69993 Hints: ( Local value of 7) - ( Face value of 7) = ( 70000 - 7) = 69993
The profit earned by selling an article of Tk. 900 is double the loss incurred when the same article is sold for Tk. 450. At what price should the article be sold make 25% profit?
Correct Answer:
C: Tk. 750
Explanation:
The profit earned by selling an article of Tk. 900 is double the loss incurred when the same article is sold for Tk. 450. At what price should the article be sold make 25% profit? Correct Answer Tk. 750 Hints: Let cost price be tk. x 900 - x = 2 ( x - 450) x = 600 tk Cost price = 600 gain required is 25% Sells price = [ (100 + 25) ×600] /100 = Tk. 750
Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat. If one piece of paper is drawn at random from the hat, what is the probability that will have an even number?
Correct Answer:
C: 4/9
Explanation:
Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat. If one piece of paper is drawn at random from the hat, what is the probability that will have an even number? Correct Answer 4/9 Hints: 1 থেকে 9 পর্যন্ত even সংখ্যা 4 টি ( 2, 4, 6, 8) even সংখ্য হওয়ার সম্ভাবনা = 4/ 9
If x is an even number, what is the difference between the smallest ever number grater than (5x+6) and the largest even number less then (3x+9)?
Correct Answer:
A: 2x
Explanation:
If x is an even number, what is the difference between the smallest ever number grater than (5x+6) and the largest even number less then (3x+9)? Correct Answer 2x x, even বা জোড় সংখ্যা হওয়ায় (5x + 6) ও জোড় সংখ্যা হবে।এখন (5x + 6) - এর বড় ক্ষুদ্রতম জোড় (even) সংখ্যাটি (5x + 6) - এর চেয়ে 2 বেশি । অর্থাৎ 5x + 6 + 2আবার, x even সংখ্যা হওয়ায় একই ভাবে (3x + 9) অবশ্যই বিজোড় সংখ্যা হবে। সুতরাং(3x + 9) - এর চেয়ে ছোট বৃহত্তম সংখ্যাটি 1 কম হবে।অর্থাৎ সংখ্যাটি হবে 3x + 9 - 1সুতরাং সঙখ্যাদ্বয়ের পার্থক্য হবে<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>(</mo><mn>5</mn><mi>x</mi><mo> + </mo><mn>6</mn><mo> + </mo><mn>2</mn><mo>)</mo><mo> - </mo><mo>(</mo><mn>3</mn><mi>x</mi><mo> + </mo><mn>9</mn><mo> - </mo><mn>1</mn><mo>)</mo><mo> = </mo><mn>2</mn><mi>x</mi><mo> - </mo><mn>3</mn><mo> + </mo><mn>3</mn><mo> = </mo><mn>2</mn><mi>x</mi></math>
Choose which pair of numbers comes next in the following serise : 8,11,21,15,18,21 22?
Correct Answer:
A: 25, 18
Explanation:
Choose which pair of numbers comes next in the following serise : 8,11,21,15,18,21 22? Correct Answer 25, 18 সিরিজটিতে প্রতিক্ষেত্রে দুটি number - এর তৃতীয় number - টি হলো 21। 21 সংখ্যাটির পূর্বের সংখ্যা দুটির পার্থক্য প্রতিক্ষেত্রে 3। সুতরাং সিরিজটিতে 22 - এর পরবর্তী সংখ্যা জোড়া হলো 25, 21।
Noman is 3 times as old as Abbas is now. Six years from now, he will be twice as old as Abbas will be then. How old is Abbas now?
Correct Answer:
A: 6
Explanation:
Noman is 3 times as old as Abbas is now. Six years from now, he will be twice as old as Abbas will be then. How old is Abbas now? Correct Answer 6 Hints: ধরি, Abbas এর বয়স x বছর Noman এর বয়স 3x বছর 3x + 6 = 2(x + 6) 3x - 2x = 12 - 6 x = 6
If membership in the Elks Club increases from 120 to 150, what is the percent increase?
Correct Answer:
B: 25%
Explanation:
If membership in the Elks Club increases from 120 to 150, what is the percent increase? Correct Answer 25% The percentage of increase is 30*100/120 = 25%
A and B invest in a business in ratio 3:2. If 5% of the total profit goes to charity and A's share is Tk 855, the total profit is.
Correct Answer:
C: Tk. 1500
Explanation:
A and B invest in a business in ratio 3:2. If 5% of the total profit goes to charity and A's share is Tk 855, the total profit is. Correct Answer Tk. 1500 Hints: Let the total profit be Tk. 100 After paying to charity A share = Tk. ( 95× 3/5) = Tk. 57 If A share is tk 57, total profit = tk.100 If A share Tk. 855 total profit = (100/57 × 855) = 1500
0.014*0.014=?
Correct Answer:
B: 0.000196
Explanation:
0.014*0.014=? Correct Answer 0.000196 Hints: 0.014 × o.o14 = 0.000196
Who is the tallest? Omar and Osman are of the same height Babu is shorter than Bithi. Bithi is taller than Osman. Omar is shorter than Babu.
Correct Answer:
C: Babu
Explanation:
Who is the tallest? Omar and Osman are of the same height Babu is shorter than Bithi. Bithi is taller than Osman. Omar is shorter than Babu. Correct Answer Babu The letters are just written reversibly.
If -2
Correct Answer:
C: -7
Explanation:
If -2 Correct Answer -7 শর্তানুসারে, - 2 <a<11 এবং 3<b<12a. 1<a + b<23 (সঠিক)b. - 2 - 12<a - b<(11 - 3) = - 14<a - b<8(সঠিক>c. 3 - 11<b - a<12 - ( - 2) = - 8<b - <14(option ভুল)
Three taps A, B and C can fill a tank in 12,25 and 20 hours respectively. If a is open all the time and B and C are open for one hour each alternately, the tank will be full in :
Correct Answer:
A: 7 hrs
Explanation:
Three taps A, B and C can fill a tank in 12,25 and 20 hours respectively. If a is open all the time and B and C are open for one hour each alternately, the tank will be full in : Correct Answer 7 hrs Hints: Answer not given. A + B s 1 hour work = ( 1/12 + 1/15) = 3/20 A + C s hours work = ( 1/12 + 1/20) = 2/15 Part filled in 2 hrs = ( 3/20 + 2/15) = 17/60 part filled 6 hrs = (3× 17/60) = 17/20 Remaining part = ( 1 - 17/20) = 3/20 Now, it is the turn of A and B and 3/20 part is filled by A and B in 1 hour Total time taken to fill the tank = ( 6 + 1) = 7 hrs
Fifteen percent of the people in Chittagong have unlisted phone numbers. If you select 300 names at random from the phone directory, what is the expected number of people who will have an unlisted phone unmber?
Correct Answer:
D: None of these
Explanation:
Fifteen percent of the people in Chittagong have unlisted phone numbers. If you select 300 names at random from the phone directory, what is the expected number of people who will have an unlisted phone unmber? Correct Answer None of these Phone number unlisted মানে তাদের নম্বর list - এর মধ্যে (Telephone directory) নেই। তাহলে Directory থেকে 300 নাম্বার এমনকি সব নাম্বার সিলেক্ট করলেও তার ভিতর unlisted number পাওয়ার সম্ভাবনা শূন্য (0)।
(1000)7+1018=?
Correct Answer:
D: 1000
Explanation:
(1000)7+1018=? Correct Answer 1000 Hints: 1018 = (103)6 = ( 1000)6 ( 1000)7÷ ( 1000)6 = 100007/10006 = ( 1000) 7 - 8 = 1000
The average annual salary of executive at Nationwide Travel last year was Tk. 550,000, while the average salary for travel consultants was Tk. 470,000. The average annual salary for all employees was Tk. 380,000.
Correct Answer:
C: There was at least one employee who earned less than the average for a travel consultant.
Explanation:
The average annual salary of executive at Nationwide Travel last year was Tk. 550,000, while the average salary for travel consultants was Tk. 470,000. The average annual salary for all employees was Tk. 380,000. Correct Answer There was at least one employee who earned less than the average for a travel consultant. (a) ও b হবে না কারণ executive ও consultant - দের সংখ্যা কত বলা হয়নি। তাই consultant - এর চেয়ে executive কম না বেশি বা executive - দের চেয়ে কোন consultant বেশি income করেছে কিনা বলা যায় না।(d) ব্যাখ্যাঃ হতেও পারে নাও পারে। Consultant - দের সংখ্যা জানা না থাকায় consultant যে lowest paid executive - এর চেয়ে বেশি বেতন পায় না তা জানা যায় না। কারণ সব consultant - এর বেতনই হয়তো 470,000 আবার সব executive - এর বেতনই হয়তো 550,000। ফলে assumption - টি নিশ্চিত করা যায় না। (c) - ই সঠিক হবে। কারণ Executive ও consultant সবার বার্ষিক আয়ের Average = 550,000 + 470,000/2 = 510,000। অথচ পুরো কোম্পানির employee - দের বার্ষিক আয়ের Average বলা হয়েছে 380,000। এখান থেকে বোঝা যায় কমপক্ষে 1 জন employee আছে যার বেতন consultant দের average salary থেকে কম। যার ফলে সবার Average বেতন কমে গেছে।
What is the absolute value of twice the difference of the roots of the equation 5y2-20y+15=0?
Correct Answer:
B: 2
How much interest will Tk. 2000 earn in one year at an annual rate of 8% if the interest is compounded every six months?
Correct Answer:
B: Tk. 163.20
Explanation:
How much interest will Tk. 2000 earn in one year at an annual rate of 8% if the interest is compounded every six months? Correct Answer Tk. 163.20 আমরা জানি,Compound amount, C = P<math xmlns = "http://www.w3.org/1998/Math/MathML"><mi>P</mi><mo>(</mo><mn>1</mn><mo> + </mo><mfrac><mi mathvariant = "normal">&#x3C0;</mi><mi>m</mi></mfrac><msup><mo>)</mo><mrow><mi>n</mi><mo>&#xD7;</mo><mi>m</mi></mrow></msup></math> = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>2000</mn><mo>(</mo><mn>1</mn><mo> + </mo><mfrac><mrow><mn>0</mn><mo>.</mo><mn>08</mn></mrow><mn>2</mn></mfrac><msup><mo>)</mo><mrow><mn>1</mn><mo>&#xD7;</mo><mn>2</mn></mrow></msup></math> = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>2000</mn><mo>(</mo><mn>1</mn><mo> + </mo><mn>0</mn><mo>.</mo><mn>04</mn><msup><mo>)</mo><mn>2</mn></msup></math> = 2000×1.0816 = 2163.20so Interest = C - P = (2163.20 - 2000) = 163.20 টাকা।
The difference of two numbers is 20% of the larger number. If the smaller number is 12 the larger one is :
Correct Answer:
B: 15
Explanation:
The difference of two numbers is 20% of the larger number. If the smaller number is 12 the larger one is : Correct Answer 15 Hints: Let the larger number be x smaller number be y Now, as given , x - y = 20% of x and y = 20 x - 12 = 0.2x o.8x = 12 x = 15
Rina and shila entered into a partnersship with their capitals in the ratio 5 : 6. At the end of 8 months, Rina withdraws her capital. If they receive the profit in the ratio of 5 : 9, find how long shila's capital was used?
Correct Answer:
B: 12 months
An amount of Tk. 735 was divided between A, B and C. If each of them had received Tk 25 less, their shares would have been in the ratio of 1:3:2. The money received by C was :
Correct Answer:
C: Tk. 245
Explanation:
An amount of Tk. 735 was divided between A, B and C. If each of them had received Tk 25 less, their shares would have been in the ratio of 1:3:2. The money received by C was : Correct Answer Tk. 245 Hints: If each of them received Tk 25 less their total = 735 - 25× 3 = 660 Individual ratio amount = 660/(1 + 3 + 2) = 110 Share received by c = (110× 2) + 25 = 220 + 25 = 245
Three coins are tossed. Find the probability of at least one head and one tail.
Correct Answer:
D: 2/3
A cube of side 5 cm is painted on all its side. If it is sliced into 1 cubic centimeter cubes, how many 1 cubic centimeter cubes will have exactly one of their sides painted?
Correct Answer:
D: 54
Babu gave 20% of his marbles to Sadeq, and 20% of the rest of marbles to Tipu. If he now has 320 marbles, how many did he have originally?
Correct Answer:
B: 500
Explanation:
Babu gave 20% of his marbles to Sadeq, and 20% of the rest of marbles to Tipu. If he now has 320 marbles, how many did he have originally? Correct Answer 500 <math <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo><mo>&#xA0;</mo><mn>100</mn><mo>%</mo><mo>&#xA0;</mo><mo>&quot;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo> = </mo><mo>&#xA0;</mo><mfrac><mrow><mn>320</mn><mo>&#xD7;</mo><mn>100</mn></mrow><mn>64</mn></mfrac><mo> = </mo><mn>500</mn></math>xmlns = "http://www.w3.org/1998/Math/MathML"><mn>20</mn><mo>%</mo><mo>&#xA0;</mo><mi>m</mi><mi>a</mi><mi>r</mi><mi>b</mi><mi>e</mi><mi>l</mi><mo>&#xA0;</mo><mi>S</mi><mi>a</mi><mi>d</mi><mi>e</mi><mi>q</mi></math> কে দেয়ার পর অবশিষ্ট থাকে (100 - 20) = 80%আবার 80% থেকে Tipu - কে দেয়ার পর অবশিষ্ট থাকে 80 - (80 এর 20%) = 64 %প্রশ্নমতে, 64% মার্বেল = 320 টি