2446 . In a factory there are 3 machines to perform a job. The newest machine can do the job in 3 days, another machine can do it in 4 days, and the third machine can do it in 6 days. How many days will the factory take to do the job using all three machines together?

A. 1.333
B. 4.333
C. 6
D. 13
E. None of these

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Answer: Option A

Explanation:

All three of the machines together can complete (1/3 + 1/4 + 1/6) = 3/4 part of the job in a day.

Those machines can complete 3/4 part of the job in 1 day.

So, the machines can complete the whole job in 1/(3/4) = 4/3 = 1.333 day.

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2447 . In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons there in the family?

A. 2
B. 3
C. 4
D. 5
E. None of these

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Answer: Option B

Explanation:

3 sons. 1 son has 2 brothers, twice of 2 brothers is 4 sisters, 1 sister has 3 sisters and 3 brothers.

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2448 . In a family, the father took 1/4 of the cake and had 3 times as much as each of the other members had. The total number of family member is-

A. 3
B. 7
C. 10
D. 12

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Answer: Option C

Explanation:

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NRBC Bank PLC || Trainee Assistant Officer (TAO) (26-10-2024)

A. 1
B. 2
C. 4
D. 7
E. None of them

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Answer: Option D

Explanation:

যেহেতু basket এ 3 টি oranges এবং 6 টি apples আছে, তাই apple সবগুলো শেষ না হওয়া পর্যন্ত apple আসার সম্ভাবনা থেকেই যায়। কিন্ত যদি 6টি apple নেওয়া শেষ হয় অর্থাৎ ৭ম নম্ররে অবশ্যই orange আসবেেএকথা নিশ্চিতভাবে বলা সম্ভব। সুতরাং উত্তর অপশন (d)

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2450 . In a garden, there are 10 rows and 12 columns of mango tress. The distance between two trees is 2 meters and a distance of one meter is left from all sides of the boundary of the garden. What is the length of the garden?

A. 20 m
B. 22 m
C. 24 m
D. 26 m
E. None of these

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Answer: Option C

Explanation:

length বের করতে হবে সর্ব্বোচ্চটির থেকে। ১২ টি column থেকে প্রাথমটির আমরা double করবনা। 11 × 2 = 22, সাথে প্রতি দুই দিক থেকে 1 মিটার যোগ 22 + 2 = 24

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2451 . In a garden, there are 10 rows and 12 columns of trees. The distance between any two trees is 2 m and a distance of 1m is left from all sides of the boundary of the garden. What is the length of the garden?

A. 20 m
B. 22 m
C. 23 m
D. 24 m
E. None of these

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Answer: Option A

Explanation:

11  ×  2  =  22 m, 1 m is left from the upper and lower side.
So length of the garden  =  22 - 2  =  20m
No, of now is less than no of column, so length of column is the length of the garden.

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2452 . In a graph there are two curves, $y_{1} = - x_{2} + 10$ $y_{2}$ will be greater than $y_{1}$ when___

A. $x > 5$
B. $x < 5$
C. $- 1$
D. $x < 9$

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Answer: Option B

Explanation:

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Sonali &- Janata Bank Ltd. Senior Officer (IT/ICT) 08.06.2018

A. Tk. 50
B. Tk. 54
C. Tk. 60
D. Tk. 62

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Answer: Option B

Explanation:

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বাংলাদেশ ব্যাংক || অফিসার (ক্যাশ) (21-07-2023)

B. 3
C. 4
D. 5

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Answer: Option B

Explanation:

( 7 - x) + x + ( 8 - x) + 3 = 15

18 - x = 15

x = 18 - 15

x = 3

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2455 . In a group of 15 , 7 have studied Latin , 8 have studied Greek, and 3 have not studied either . How many of these studied both Latin and Greek ?

B. 3
C. 4
D. 5
E. None of these

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Answer: Option B

Explanation:

( 7 - x) + x + ( 8 - x) + 3 = 15

18 - x = 15

x = 18 - 15

x = 3.

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Bangladesh Bank - Assistant Director - 2009

A. 3
C. 4
D. 6
E. None of these

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Answer: Option A

Explanation:

The number of students studying Latin or French n(LUF) = 15 - 3 = 12

Now, n(LUF) = n(L) + n(F) - n(LꓵF)

or, n(LꓵF) = n(L) + n(F) - n(LUF) = 7 + 8 - 12 = 3

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2457 . In a group of 15 high school students, 7 study Latin, 8 study French and 3 study nither Latin nor French. How many students study both Latin and French?

A. 3
C. 15
D. 4

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Answer: Option A

Explanation:

The number of students studying Latin or French n(LUF) = 15 - 3 = 12

Now, n(LUF) = n(L) + n(F) - n(LꓵF)

or, n(LꓵF) = n(L) + n(F) - n(LUF) = 7 + 8 - 12 = 3

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2458 . In a group of 52 persons , 16 drink tea but not coffee and 33 drink tea. How many drink coffee but not tea?

A. 3
B. 7
C. 19
D. 17

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Answer: Option C

Explanation:

Total persons = 52

Tea but not coffee = 16 and tea = 33

∴Both tea and coffee = 33 - 16 = 17

∴Coffee but not tea = 52 - (16 - 17) = 19

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2459 . In a group of 60 people, 27 like coke and 42 like borhani and each person likes at least one of the two drinks How many people like both coke and borhani?

A. 9
B. 129
C. 69
D. 15

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Answer: Option A

Explanation:

Total= coke + pepsi - both

বা, 60= 27+42 - both

বা, 60= 69- both

বা, both= 69-60= 9

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Sonali &amp- Janata Bank Ltd. Senior Officer (IT/ICT) 08.06.2018

A. 7
B. 9
C. 11
D. 13

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Answer: Option B

Explanation:

যেহেতু সবাই দুইটির যেকোনো একটি পছন্দ করে সেহেতু

T = n(c) + n(p) - n(B) + None

60 = 27 + 42 - n(B) + 0

n(B) = 69 - 60

n(B) = 9

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2446 . In a factory there are 3 machines to perform a job. The newest machine can do the job in 3 days, another machine can do it in 4 days, and the third machine can do it in 6 days. How many days will the factory take to do the job using all three machines together?

2447 . In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons there in the family?

2448 . In a family, the father took 1/4 of the cake and had 3 times as much as each of the other members had. The total number of family member is-

2449 . In a fruit basket there are six appless and three oranges. How many fruits do you have to take to ensure that you take at least one orange?

2450 . In a garden, there are 10 rows and 12 columns of mango tress. The distance between two trees is 2 meters and a distance of one meter is left from all sides of the boundary of the garden. What is the length of the garden?

2451 . In a garden, there are 10 rows and 12 columns of trees. The distance between any two trees is 2 m and a distance of 1m is left from all sides of the boundary of the garden. What is the length of the garden?

2453 . In a group of 135 persons, 50% people contributed tk. 40 each, 30% contributed Tk. 60 each and the remaining persons contributed Tk. 80. Find the average contribution for the group.

2454 . In a group of 15, 7 have studied Latin, 8 have studied Greek and 3 have not studied either. How many of these studied both Latin and Greek?

2455 . In a group of 15 , 7 have studied Latin , 8 have studied Greek, and 3 have not studied either . How many of these studied both Latin and Greek ?

2456 . In a group of 15 high school students, 7 study Latin, 8 study French and 3 study neither Latin nor French. How many students study both Latin and French?

2457 . In a group of 15 high school students, 7 study Latin, 8 study French and 3 study nither Latin nor French. How many students study both Latin and French?

2458 . In a group of 52 persons , 16 drink tea but not coffee and 33 drink tea. How many drink coffee but not tea?

2459 . In a group of 60 people, 27 like coke and 42 like borhani and each person likes at least one of the two drinks How many people like both coke and borhani?

2460 . In a group of 60 people like Coca cola and 42 people like Pepsi Cola. Each person likes at least one of the two drinks. How many of these people like both Coca Cola and Pepsi Cola ?

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