3136 . Three workers can do a job in 12 days. Two of the workers work twice as fast as the third. How long would it take one of the faster workers to do the job himself ?

A. 24
B. 30
C. 32
D. None of these

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Answer: Option B

Explanation:

1 faster person = 2 slower person
so , 2 faster + one slower = 5 slower person
5 slower person can do the work in 12 days
1 ,, ,, ,, ,, 12X5 days = 60 days
As, 2 slower = 1 faster then,
1 faster person can do the work in 60/2 = 30 days .

Bangladesh Bank - Officer - 2001

A. 57
B. 15
C. 76
D. 38

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Answer: Option A

Explanation:

ধরি, ৩ জন বালকের মারবেল আছে

যথাক্রমে ১৯ক, ৫ক, ৩ক টি

প্রশ্নমতে, ৩ক = ৯

ক = ৩

সুতরাং, সবচেয়ে বেশি মারবেল আছে = ১৯ × ৩ = ৫৭ টি।

3138 . Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

A. 0.45
B. 0.4
C. 0.25
D. 0.5
E. None of these

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Answer: Option A

Explanation:

যুক্তরাষ্ট্রের অনুষ্ঠিত ৪৫তম Copa America Football Tournament 2016 এর চ্যাম্পিয়ন দেশ চিলি। রানার্স আপ হয় আর্জেন্টিনা। এটি ছিল শতবর্ষী কোপা আমেরিকা। ৪৬ তম কোপা আমেরিকা অনুষ্ঠিত হবে ২০১৯ সালে ব্রাজিলে।

3139 . Tina rented a rickshaw for Tk. 18 plus Tk. 0.10 per km. Ruby rented another rickshaw for Tk.25 plus Tk. 0.05 per km. If each moves d km and paid exactly the same amount of rental, then d=?

A. 100
B. 120
C. 135
D. 140

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Answer: Option D

Explanation:

3140 . Tk. 51 is distributed between Sumi and Meem in such a way that Sumi receives Tk.3 less than twice the amount received by Meem. The amount (in Taka) received by Sumi is:

A. 29
B. 39
C. 33
D. 27

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Answer: Option C

Explanation:

Let, Meem = x

Sumi = 2x - 3

So, x + 2x - 3 = 51

3x = 54

x = 18

Sumi = 18 × 2 - 3 = 33 ( Tk.)

Agrani Bank Ltd. Recruitment Test for Senior Officer 12.02.2010

A. Tk. 3,600
B. Tk. 5,400
C. Tk. 4,500
D. Tk. 6,300
E. None of these

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Answer: Option B

Explanation:

Rahu & Habu together have = {(2 + 4)/(1 + 2 + 3 + 4)}x9000 = 5400 TK.

3142 . Tk.2000 is deposited in a savings account which pays 6% annual interest compounded semi-annually. To the nereast taka, how much is in the account at the end of the year?

A. Tk.2122
B. Tk.2247
C. Tk.2258
D. Tk.2060

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Answer: Option A

Explanation:

3143 . Tk 7500 is divided in the ratio of 1:2:3:4:5 find the difference between the greatest and smallest shares?

A. 1500
B. 2000
C. 2600
D. 2700

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Answer: Option B

Explanation:

let the ratio be - x, 2x, 3x, 4x, 5x

now,

x + 2x + 3x + 4x + 5x = 7500

15x = 7500

x = 500

Greatest share - 5x = 5*500 = 2500

Smallest share x = 500

Difference - (2500 - 500) = 2000

3144 . Tk.800 amounts to Tk.920 in 3 years at simple interest. If the interest rate is increased by 3%, it would amount to how much?

A. 1182
B. 992
C. 1056
D. 1112

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Answer: Option B

Explanation:

3145 . TK. 800 becomes TK. 956 in 3 years at a certain rate of simple interest. If the rate of interest is increased by 4%, what amount will TK. 800 become in 3 years?

A. TK. 1020.80
B. TK. 1025
C. TK. 1052
D. None of these

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Answer: Option C

Explanation:

Correct option is C)

(c) Principal =tk.800, Amount =tk.956
⇒S.I.=tk.956−tk.800=tk.156
Time =3 years ∴Rate%p.a.=800×3156×100=6.5.
Now, Principal =Rs.800,Rate%p.a.=10.5, Time =3 years
∴ Amount =tk.800+tk.(800×10.5×3/100)
=tk.800+Rs.252=tk.1052.

Bangladesh Bank - Assistant Director - 2016

A. Tk. 135
B. Tk. 100
C. TK. 120
D. Tk. 150

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Answer: Option A

Explanation:

Let, C gets Tk. x

So, A gets Tk x - 15

B gets Tk. (x - 15 - 20) = x - 35

ATQ, x + x - 15 + x - 35 = 355

= > 3x - 50 = 355

= > 3x = 355 + 50 = 405

∴ x = (405/3) = 135

Hence, C gets Tk. 135

Ans.

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

A. Tk.8000
B. Tk.8250
C. Tk.9000
D. Tk.9250

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Answer: Option B

Explanation:

Capital, P= 6000 tk

Capital + 4 Year's Interest = 7200 tk

4 Year's Interest = 7200-6000 = 1200 tk

1 Year's Interest = 1200/4 = 300 tk

Interest rate = (300÷6000)×100 = 5%

New Interest Rate, r = 5×1.5 = 7.5%

Year, n = 5

So, the amount = P ( 1 + n.r )

= 6000 { 1 + 5× (7.5÷100)}

= 6000 × 1.375

= 8250 tk.

বাংলাদেশ ব্যাংক || সহকারী পরিচালক (AD) (20-10-2023)

A. 132
B. 120
C. 60
D. 23
E. None of these

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Answer: Option B

Explanation:

এটি permutation এর অঙ্ক। 3 জন officer 6 জন থেকে = ⁶P3 এবং 2 জন manager 4 জন থেকে = ⁴P2; total = ⁶P3 + ⁴P2 = 132

update: (11-02-23) it is combination problem. Since the order of vacancies doesn't matter.

⁶C3 = 20 and ⁴C2= 6, 20 × 6 = 120 is the right answer. Given ans is wrong

3149 . To fill a tank, 25 buckets of water are required. How many buckets of water will be required to fill the same tank if the capacity of the bucket is reduced to two-fifth of its present capacity?

A. 62.5
B. 35
C. 10
D. Cannot be determined

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Answer: Option A

Explanation:

Let, capacity of the bucket is x litter

So, the capacity of tank is 25x litrer

Reduced capacity of bucket is 25x/5 litrer

So, to fill tank bucket requires = 25x/(2x/5) = (25x × 5) / 2x = 62.5 bucket.

বাংলাদেশ ব্যাংক || সহকারী পরিচালক (AD) (20-10-2023)

A. multiply 30 by π
B. divide 30 by 2π
C. divide 15 by 2π
D. divide 30 by π

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Answer: Option D

Explanation:

3136 . Three workers can do a job in 12 days. Two of the workers work twice as fast as the third. How long would it take one of the faster workers to do the job himself ?

3137 . Threee boys have marbles in the ratio of 19:5:3. If the boy with the least number has 9 marbles, how many marbles does the boy with the highest number have?

3138 . Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

3139 . Tina rented a rickshaw for Tk. 18 plus Tk. 0.10 per km. Ruby rented another rickshaw for Tk.25 plus Tk. 0.05 per km. If each moves d km and paid exactly the same amount of rental, then d=?

3140 . Tk. 51 is distributed between Sumi and Meem in such a way that Sumi receives Tk.3 less than twice the amount received by Meem. The amount (in Taka) received by Sumi is:

3141 . Tk. 9,000 is divided among Abu, Rabu, Babu and Habu by 1 : 2 : 3 : 4 ratio. How much money do Rabu and Habu have together?

3142 . Tk.2000 is deposited in a savings account which pays 6% annual interest compounded semi-annually. To the nereast taka, how much is in the account at the end of the year?

3143 . Tk 7500 is divided in the ratio of 1:2:3:4:5 find the difference between the greatest and smallest shares?

3144 . Tk.800 amounts to Tk.920 in 3 years at simple interest. If the interest rate is increased by 3%, it would amount to how much?

3145 . TK. 800 becomes TK. 956 in 3 years at a certain rate of simple interest. If the rate of interest is increased by 4%, what amount will TK. 800 become in 3 years?

3146 . TK. 355 has been divided among A, B,C in such a way that a had TK. 20 more than B and C had Tk. 15 more than B and C had Tk. 15 more than A How much was C's share?

3147 . Tk.6000 becomes Tk.7200 in 4 years at a certain rate of simple interest. If the rate becomes 1.5 times of itself, the amount of same principal in 5 years will be-

3148 . To fill a number of vacancies, a company must hire 3 officers from 6 applicants, and 2 managers from 4 applicants. What is the total number of ways in which the company can make its selection?

3149 . To fill a tank, 25 buckets of water are required. How many buckets of water will be required to fill the same tank if the capacity of the bucket is reduced to two-fifth of its present capacity?

3150 . To find the diameter of a circle where circumference is 30 inches:

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