391 . 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:

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

View Answer	Favorite Question

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

প্রিমিয়াম প্ল্যান: ১ মাস

99 ৳

৩০ দিনের জন্য সকল লাইভ এবং আর্কাইভ মডেল টেস্ট, প্রশ্ন ব্যাংক ও লেকচার শিট সহ অ্যাপ এর প্রিমিয়াম সব এক্সেস পাবেন।

সাবস্ক্রিপশন লিংক

392 . 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

View Answer	Favorite Question

Answer: Option C

Explanation:

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

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

View Answer	Favorite Question

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

View Answer	Favorite Question

Answer: Option D

Explanation:

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

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

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

View Answer	Favorite Question

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

396 . 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

View Answer	Favorite Question

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

View Answer	Favorite Question

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.

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

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

View Answer	Favorite Question

Answer: Option D

Explanation:

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

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

View Answer	Favorite Question

Answer: Option C

Explanation:

Let the no be x

Acc to ques.

x-3x/5 = 50

So,x=125

400 . 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

View Answer	Favorite Question

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

View Answer	Favorite Question

Answer: Option A

Explanation:

402 . 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

View Answer	Favorite Question

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

View Answer	Favorite Question

Answer: Option D

Explanation:

বাংলাদেশ ব্যাংক || সহকারী পরিচালক 28-10-2022

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

View Answer	Favorite Question

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.

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

B. 1
C. 2
D. 2

View Answer	Favorite Question

Answer: Option B

Explanation:

391 . 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:

392 . 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:

393 . 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?

394 . 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-

395 . 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?

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

397 . 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?

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

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

400 . 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 ?

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

402 . 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 ?

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

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

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