361 . The average of the first and the second of three numbers is 15 more than the average of the second and the third of these numbers .what is the difference between the first and the third of these three numbers?

A. 15
B. 45
C. 60
D. None of these

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Answer: Option D

Explanation:

Let Ist no = x
2nd no = y
3rd no = z
According to Q.
(x + y)/2 = 15 + (y + z)/2
Multiply above equation by 2
x + y = 30 + y + z So,
x - z = 30 Difference of Ist & 3rd no is 30.

Officer (General) -Ansar VDP Unnayan | BD House Building Finance Corporation 28.09.2018

A. 3
B. 5
C. 7
D. 11

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Answer: Option C

Explanation:

According to the question,
⇒(x + y + z)/3 = 45
⇒x + y + z = 135.....(i)
⇒x = (y + z)/2 + 9
⇒2x−y−z = 18.....(ii)
x + y + z = 135
2x−y−z = 18
−−−−−−−−−−−− 3x = 153
x = 51
From (i)
y + z = 135 - 51 = 84.....(iii)
Also,
⇒(y + z)/2 = y + 2
⇒y + z = 2y + 4
⇒z−y = 4
+ y + z = 84
−y + z = 4
−−−−−−−−−
2z = 88
z = 44
Required difference = 51 - 44 = 7

363 . The average of the three numbers x , y and z is 45 , x is greater than the average of y and z by 9. The average of y and z is greater than y by 2 .Then the difference of x and z is:

A. 3
B. 5
C. 7
D. 11

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Answer: Option C

Explanation:

Senior Officer- 8 Bank Recruitment Test 31-08-2018

A. 76
B. 79
C. 85
D. 87

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Answer: Option A

Explanation:

সমন্বিত ৫ ব্যাংক | অফিসার ক্যাশ | 25-03-2022 ||

A. 38.5 Degree Celcius
B. 40.8 Degree Celcius
C. 41.3 Degree Celcius
D. 41.8 Degree Celcius

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Answer: Option D

Explanation:

Temperature on the fourth day
= [(40.2 × 4 + 41.3 × 4) - (40.6 × 7)]° C
= 41.8° C

366 . The average weight of 3 men is 53 kg. None of them weights less than 51 kg. What is the maximum possible weight (in kg) of a person in that group?

A. 57
B. 59
C. 53
D. 55
E. None

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Answer: Option A

Explanation:

The total weight of them = 53×3 = 159 kg

Minimum weight possible for any 2 of them = 51×2 = 102 kg

Maximum weight of any 1 of them = 159 - 102 = 57 kg

367 . The compound interest on Tk.10000 for 4 years @ 5% per annum will be approximately

A. Tk.2000
B. Tk.2025
C. Tk.2075
D. Tk.2100
E. Tk.2150

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Answer: Option E

Explanation:

I=p(1+r)^n

=10000(1+5/100)⁴

=12155.06

So, Compound Interest=12155.06-10000=2155.06≈2155

(ans)

Bangladesh Bank - Assistant Director - 2006

A. 3
B. 4
C. 6
D. 8
E. None of these

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Answer: Option E

Explanation:

The objective here is that 70% of the fruit in the box should be apples.

Now, there are 6 apples at start and there is no talk of removing any apples, so number of apples should remain 6 and they should constitute 70% of total fruit, so total fruit = 6/0.7 = 12 [approximate]
So we should have 12-6 = 6 oranges.
Right now, there are 27 oranges, so to get to 6 oranges, we should remove 27 - 6 = 21 oranges.

369 . The difference between a number and its square is 72. What is the number?

A. 18
B. 19
C. 30
D. 9

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Answer: Option D

Explanation:

সমন্বিত ৫ ব্যাংক | অফিসার ক্যাশ | 25-03-2022 ||

A. 75
B. 1000
C. 125
D. None of these

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Answer: Option C

Explanation:

Let the no be x

Acc to ques.

x-3x/5 = 50

So,x=125

371 . 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

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

Explanation:

373 . 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

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:

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.

361 . The average of the first and the second of three numbers is 15 more than the average of the second and the third of these numbers .what is the difference between the first and the third of these three numbers?

362 . The average of the three numbers x, y, and z is 45. x greater than the average of y and z by 9. The average of y and z is grater than y by 2. Then the difference of x and z is:

363 . The average of the three numbers x , y and z is 45 , x is greater than the average of y and z by 9. The average of y and z is greater than y by 2 .Then the difference of x and z is:

364 . The average runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings to increase his average of runs by 4?

365 . The average temperature for the first 4- days of a week is 40.2-degree Celcius and that of the last 4 days is 41.3-degree Celcius If the average temperature for the whole week is 40.6-degree Celcius then the temperature on the fourth day is-

366 . The average weight of 3 men is 53 kg. None of them weights less than 51 kg. What is the maximum possible weight (in kg) of a person in that group?

367 . The compound interest on Tk.10000 for 4 years @ 5% per annum will be approximately

368 . The contents of a certain box consist of 9 apples and 27 oranges. How many oranges must be removed from the box so that 70% of the pieces of fruits in the box will be apples?

369 . The difference between a number and its square is 72. What is the number?

370 . The difference between a number and its three-fifth is 50. What is the number?

371 . 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 ?

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

373 . 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 ?

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

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