406 . The difference between simple and compound interest on a sum of money at 20% per annum for 3 years is Tk. 48. What is the sum ?

A. Tk. 550
B. Tk. 500
C. Tk. 375
D. Tk. 400

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Answer: Option C

Explanation:

Let principal amount be Tk.100.
Then, S.I. = (100 × 20 × 3)/100 = Tk.60
and C.I. = 100 (1 + 20/100)^3−100
= 100 × (6/5)^3−100 = 364/5
∴ C.I. - S.I. = 364/5−60 = 64/5
If the difference is Tk.64/5, Principal = Tk.100
If difference is Tk.48
Principal = (100 × 5/64) × 48 = Tk.375

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অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯

A. 2√6
B. 16√6
C. 9√6
D. 6√2
E. 8√6

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Answer: Option A

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408 . The different between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of its of that number ?

A. 4
B. 2
C. 10
D. 16
E. None of them

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Answer: Option A

Explanation:

Let the ten's digit be x and unit's digit be y.
Then, (10x + y) - (10y + x) = 36
⇒ 9(x - y) = 36
⇒ x - y = 4

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Bangladesh Bank - Assistant Director - 2012

A. 1520 sq meter
B. 2420 sq meter
C. 2480 sq meter
D. 2520 sq meter

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Answer: Option D

Explanation:

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বাংলাদেশ ব্যাংক || সহকারী পরিচালক 28-10-2022

A. 50
B. 60
C. 80
D. 90
E. None of these

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Answer: Option B

Explanation:

Complete trip = 10 floors up and 10 floors down = 20 floors = 20*1/4 = 5 minutes + 2 minutes = 7 minutes.

7 hour = 420 minutes.

In 420 minutes operator can make 420/7 = 60 trips.

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411 . The equation x+y=xy =x/y has how many real solution?

B. 1
C. 2
D. 3

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Answer: Option B

Explanation:

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প্রবেশনারি অফিসার | 02-04-2022

A. There are certain disadvantages for the United States economy attached to devaluation
B. The prospect of devaluation results in a speculative outflow of funds
C. By encouraging exports and discouraging imports, devaluation can improve the American balance of payments
D. The difference between the exports and imports is called the trade gap
E. It is possible that inflation neutralises the beneficial effects of devaluation

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Answer: Option C

Explanation:

Based on the given information, let's analyze the options provided:

A. There are certain disadvantages for the United States economy attached to devaluation.
This can be inferred from the statement. If the dollar is devalued in terms of other currencies, it suggests that there may be certain disadvantages for the United States economy, such as potentially higher import costs and reduced purchasing power.

B. The prospect of devaluation results in a speculative outflow of funds.
This can be inferred from the statement. If there is a prospect of devaluation, it can lead to a speculative outflow of funds as individuals and investors anticipate a potential decrease in the value of the currency.

C. By encouraging exports and discouraging imports, devaluation can improve the American balance of payments.
This can be inferred from the statement. Devaluation can make American goods relatively cheaper in terms of foreign currencies, which can encourage exports and discourage imports. This shift in trade balance can potentially improve the American balance of payments.

D. The difference between the exports and imports is called the trade gap.
This is not directly stated or implied in the given information. The term "trade gap" refers to the difference between the value of a country's exports and imports, but the statement does not provide information about the trade gap.

E. It is possible that inflation neutralizes the beneficial effects of devaluation.
This can be inferred from the statement. If devaluation leads to higher prices for imported goods, it can contribute to inflation. Inflation can potentially offset the beneficial effects of devaluation by increasing domestic prices and reducing the competitiveness of American goods.

Therefore, the option that cannot be inferred from the statement is option D: The difference between the exports and imports is called the trade gap.

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Bangladesh Bank - Assistant Director - 2011

A. 34
B. 36
C. 38
D. 40

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Answer: Option B

Explanation:

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জাতীয় নিরাপত্তা গোয়েন্দা সংস্থা-(NSI) Assistant Director- Research officer &amp- Assistant Programmer-০৮/১০/২০২১

A. 50%
B. 56%
C. 20%
D. 36%
E. 45%

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Answer: Option B

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415 . The length of a rectangle is increased by 25% . By what percentage should the width be decreased so that the area of the rectangle remains unchanged ?

A. 30%
B. 25%
C. 20%
D. 35%
E. None of them

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Answer: Option C

Explanation:

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Bangladesh Bank - Assistant Director - 2012

A. 5
B. 6
C. 15
D. 30

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Answer: Option D

Explanation:

Let the sides of the triangle are

3x,5x and 6x

Given perimeter(3x + 5x + 6x) = 70

= > 14x = 70

∴ x = 5

So longest side of the triangle is 6

= 6×5 = 30

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Bangladesh Bank - Assistant Director - 2013 ||

A. 10
B. 15
C. 17
D. 12
E. 18

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Answer: Option C

Explanation:

Here, 13, 7 and 11 are prime number

So, among these numbers only 17 is correct because of prime number.

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Bangladesh Bank - Assistant Director - 2013 ||

A. 4
B. 5
C. 6
D. 7

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Answer: Option C

Explanation:

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419 . The only persons who attended a meeting were four ship captains and the first mates of three of those captains . The captains were R, S, T, and W; the first mates were L, N, and V. Each first mate present spoke immediately after his or her captain . S wa

A. S, L, T, V, W, R, N
B. S, N, T, V, R, W, L
C. S, T, L, R, N, W, V
D. S, T, L, W, N, R, V
E. All of them

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Answer: Option E

Explanation:

Based on the given information, we can determine the order in which the speakers spoke as follows:

1. S (captain)
2. L (first mate)
3. T (captain)
4. N (first mate)
5. V (first mate)
6. W (captain)
7. R (captain)

Therefore, the correct order of speaking is:

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Bangladesh Bank - Assistant Director - 2011

A. 25%
B. 45%
C. 55%
D. 64%
E. 67%

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Answer: Option D

Explanation:

Let, last year visitor were 100

Projected visitor = 100 + 25 = 125

Actual visitor = 100 - 20 = 80

% of attended visotor = 80/125 × 100% = 64%

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Bangladesh Bank - Assistant Director - 2011

406 . The difference between simple and compound interest on a sum of money at 20% per annum for 3 years is Tk. 48. What is the sum ?

407 . The difference between √150 and √54 is--

408 . The different between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of its of that number ?

409 . The different between the length and breath of rectangle is 23 meter. If its perimeter is 206 meter, then, its area is-

411 . The equation x+y=xy =x/y has how many real solution?

412 . The exchange rate is the ruling official rate of exchange of dollars for other currencies . It determines the value of American goods in relation to foreign goods. If the the dollar is devalued in terms of other currencies , American exports ( which are

413 . The H.C.F and L.C.M of two numbers are 12 and 288 respectively. If one of the numbers is 96. Find the other.

414 . The length and breadth of a square are increased by 30% and 20% respectively. The area of the rectangle. So formed exceeds the area of the square by--

415 . The length of a rectangle is increased by 25% . By what percentage should the width be decreased so that the area of the rectangle remains unchanged ?

416 . The lengths of the sides of a triangle are in the ratio of 3 to 5 to 6 . If the perimeter of the triangle is 70, what is the length of the longest side ?

417 . The numbers 13,7 and 11 would enjoy the company of which of these numbers : 10, 15, 17, 12, 18 ?

418 . The numbers 2,3,5 and x have an average equal to 4 . What is x?

419 . The only persons who attended a meeting were four ship captains and the first mates of three of those captains . The captains were R, S, T, and W; the first mates were L, N, and V. Each first mate present spoke immediately after his or her captain . S wa

420 . The organizers of a fair projected 25% increase of visitors this year over that of the last year but the actual turnover was 20% less than that of the last year. What percent of projected visitors attended the fair ?

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