5 th of the remainder on another day. If there were 30 pages unread, how many pages did the book contain?

A. 240
B. 300
C. 600
D. 800

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Answer: Option A

Explanation:

If 3/8 of the book were read the first day, 5/8 part were remaining 4/5 of 5/8 = 4/5 * 5/8 = 4/8 So now 3/8 + 4/8 = 7/8 have been read The 30 pages that remain must be 1/8 of the total. So if p is the total number of pages: p/8 = 30 p = 240 pages Hence the book contain 240 pages did the book contain.

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সমন্বিত ১০ ব্যাংক ও আর্থিক প্রতিষ্ঠান || অফিসার (জেনারেল) (08-03-2024)

A. 12
B. 15
C. 25
D. 32

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Answer: Option A

Explanation:

Hints: Let the number be x

x ×52 = x ×25 + 324

27x = 324

x = 12

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738 . A boy was asked to multply a number by 7/8 instead he divided the number by 7/8 and got the result 15/14 more than what he should have got if he had multiplied the number by 7/8. The number is ---

A. 8
B. 6
C. 4
D. None of these

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Answer: Option C

Explanation:

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739 . A bus travelling at a speed of 5 km/hour, takes 3 hours to complete a distance. If it takes 4 hours to complete the same distance by your car, what is your speed ?

A. 24km/hour
B. 40km/hour
C. 3.75km/hour
D. none of these

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Answer: Option C

Explanation:

Speed 5km/hr

Time taken 3 hours

So, distance=5×3=15 km

So, my speed=15/4=3.75 km/hr

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740 . A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x taka per hour before the reduction in hours, how much does he earn hour under the new system?

A. 1/10
B. x/9
C. 9x/10
D. 10x/9

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Answer: Option D

Explanation:

In 1 hour it's x taka

So, in 40 hours it's 40x taka

So, earn per hour in new system=40x/36=10x/9

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741 . A businessman has 1000 kg of rice, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. How much Kg of rice did he sell at 18% profit?

A. 600
B. 620
C. 640
D. None

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Answer: Option A

Explanation:

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গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড | সহকারী ব্যবস্থাপক | ২০.০৪.২০১৮

A. 8
B. 6
C. 4
D. 10

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Answer: Option A

Explanation:

rehana took = 1/3 of 18 pieces = 6 pieces

ramaining = 12 pieces

rahim took 1/3 of 12 pieces = 4 pieces

total remaining = 12 - 4 = 8 pieces.

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সমন্বিত ব্যাংক অফিসার (ক্যাশ) || (02-06-2023)

A. 8 : 10 a.m
B. 8 : 05 a.m
C. 8 : 15 a.m
D. 7 : 50 a.m

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Answer: Option B

Explanation:

Three quarters of an hour = 45 minutes

7:20 am + 45 minutes = 8:05 am

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744 . A can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the efficiency of In how many days C can complete the works= alone?

A. 24 days
B. 10 days
C. 16 days
D. 12 days

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Answer: Option A

Explanation:

Efficiency ratio of A:B = 1 : 3 = 2:1

So, days ratio A:B = 1:2

A needs 12 days, So B needs 12x2 = 24 days

C can do in 1 day = 1/6 - {(1/12) + (1/24)} = (1/6) - ((3/24) = (1/24) part

C can do 1/24 part in 1 day

" " " 1 " " 1X24 = 24 day.

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Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

A. 16 days
B. 18 days
C. 23 days
D. 27 days

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Answer: Option B

Explanation:

1 দিনে A ও B একত্রে করে ( 1/20 + 1/30) = 1/12 অংশ

B 10 দিনে করে 10/30 অংশ = 1/3 অংশ

অবশিষ্ট ( 1 - 1/3) = 2/3 অংশ

A ও B একত্রে 1/12 অংশ করে 1 দিনে

A ও B একত্রে 1 অংশ করে = ( 12 ×1) দিনে

A ও B একত্রে 2/3 অংশ করে = 12 × 2 /3 = 8 দিনে

মোট সময় লাগে ( 10 + 8) দিন = 18 দিন

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746 . A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?

A. 10
B. 20
C. 21
D. 25

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Answer: Option C

Explanation:

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Uttara Bank PLC || Probationary Officer (09-11-2024) || 2024

A. 8 hours
B. 12 hours
C. 10hours
D. 24 hours

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Answer: Option B

Explanation:

A,B and C together need = (3×4)/(3 + 4) = 12/7 hours

And C need 2 hours

∴B need = {(12/7)×2}/{2 - (12/7)} hours

= (24/7)/{(14 - 12)/7}

= 24/2 hours

= 12 hours

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748 . A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

A. 8 hours
B. 10 hours
C. 12 hours
D. 24 hours
E. None of these

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Answer: Option C

Explanation:

A 1 hour work = 1/4

(B + C) 1 hour work = 1/3

(A + C) 1 hour work = 1/2

(A + B + C) 1 hour work = (1/4 + 1/3) = 7/12

B 1 hour work = ( 7/12 - 1/2) = 1/12

B alone will take 12 hour to do the work.

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749 . A can do a work in 20 days, and B in 30 days. They work together for 6 days. How much of the work is left?

A. $\frac{1}{3}$
B. $\frac{1}{2}$
C. $\frac{1}{4}$
D. $\frac{2}{5}$

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Answer: Option B

Explanation:

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সমন্বিত ৫ ব্যাংক ও ১ আর্থিক প্রতিষ্ঠান — অফিসার (ক্যাশ) (11-07-2025) | 2025

A. 2/5
B. 1/6
C. 1/9
D. 2/7

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Answer: Option B

Explanation:

Hints: Given that B alone can complete the same work in day = half the time taken by A = 9 days

A's One day's work = 1/18

B's One days work = 1/9

(A + B)'s one days work = 1/18 + 1/9 = 1/6

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736 . A boy read 3/8 th of a book on one day and 4/5 th of the remainder on another day. If there were 30 pages unread, how many pages did the book contain?

737 . A boy was asked to multiply a number by 25. He instead multiplied the number by 52 and got the answer 324 more than the correct answer. The number to be multiplied was :

738 . A boy was asked to multply a number by 7/8 instead he divided the number by 7/8 and got the result 15/14 more than what he should have got if he had multiplied the number by 7/8. The number is ---

739 . A bus travelling at a speed of 5 km/hour, takes 3 hours to complete a distance. If it takes 4 hours to complete the same distance by your car, what is your speed ?

740 . A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x taka per hour before the reduction in hours, how much does he earn hour under the new system?

741 . A businessman has 1000 kg of rice, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. How much Kg of rice did he sell at 18% profit?

742 . A cake is divided into 18 pieces. If Rehana takes 1 / 3rd of the cake and Rashed takes 1 /3rd of the cake left, how many pieces are left?

743 . A cake is put in the oven at 7.20 am. If the cake takes three quarters of an hour to bake, at what time should it be taken out of the oven?

744 . A can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the efficiency of In how many days C can complete the works= alone?

745 . A can complete a project in 20 days and B can complete the same project in 30 days. A and B start working on the project together and A quits 10 days before the project is expected to be completed. How many days in total will the project take to complete ?

746 . A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?

747 . A can do 3 piece of work in 4 hours, B and C together in 3 hours , and A and C together in 2 hours. How long will B alone take to do it?

748 . A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

750 . A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day ?

কোর্স ক্যাটাগরি

প্রয়োজনীয় লিঙ্ক

736 . A boy read 3/8 th of a book on one day and 4/5 th of the remainder on another day. If there were 30 pages unread, how many pages did the book contain?

737 . A boy was asked to multiply a number by 25. He instead multiplied the number by 52 and got the answer 324 more than the correct answer. The number to be multiplied was :

738 . A boy was asked to multply a number by 7/8 instead he divided the number by 7/8 and got the result 15/14 more than what he should have got if he had multiplied the number by 7/8. The number is ---

739 . A bus travelling at a speed of 5 km/hour, takes 3 hours to complete a distance. If it takes 4 hours to complete the same distance by your car, what is your speed ?

740 . A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x taka per hour before the reduction in hours, how much does he earn hour under the new system?

741 . A businessman has 1000 kg of rice, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. How much Kg of rice did he sell at 18% profit?

742 . A cake is divided into 18 pieces. If Rehana takes 1 / 3rd of the cake and Rashed takes 1 /3rd of the cake left, how many pieces are left? ​

743 . A cake is put in the oven at 7.20 am. If the cake takes three quarters of an hour to bake, at what time should it be taken out of the oven?

744 . A can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the efficiency of In how many days C can complete the works= alone?

745 . A can complete a project in 20 days and B can complete the same project in 30 days. A and B start working on the project together and A quits 10 days before the project is expected to be completed. How many days in total will the project take to complete ?

746 . A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?

747 . A can do 3 piece of work in 4 hours, B and C together in 3 hours , and A and C together in 2 hours. How long will B alone take to do it?

748 . A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

750 . A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day ?

742 . A cake is divided into 18 pieces. If Rehana takes 1 / 3rd of the cake and Rashed takes 1 /3rd of the cake left, how many pieces are left?