2866 . Sellling 12 pen at a price of Tk 10 yields a loss of a% Selling 12 pen at a price of Tk 12 yields a profit of a%. What is the value of a?

A. 10
B. 11
C. 100/11
D. 11/100

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Answer: Option C

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2867 . Set X contains 10 consecutive integers. If the sum of the 5 smallest members of set X is 265, what is the average of the 5 largest members of Set X?

A. 58
B. 59
C. 60
D. 57
E. None of these

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Answer: Option A

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2868 . Seven friends are having lunch together in a fast food shop. Each of them east at least 3/5th of a pizza. What is the smallest number of whole pizzas needed for their lunch?

A. 7
B. 5
C. 6
D. 28
E. None of these

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Answer: Option B

Explanation:

There are 7 person for lunch

One person eats 3/5 of a pizza

So 7 person eats = 3/5*7 = 21/5

= 4.2 pizzas

so, the smallest no. of whole pizzas is 5

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2869 . Shahin has purchased a square sheet of plywood of 169 square feet area. To cover a wall he must cut off two feet from a side. What is the area, in square feet of the wall?

A. 117
B. 121
C. 143
D. 141

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Answer: Option C

Explanation:

Side of the plywood = √169 = 13 feet

Cutting of 2 feet from a side will make it a rectangular sheet with a length of 13 feet and a width of 11 feet. Area of the wall is equal to the area of this sheet.

So, the area of the wall = 13 x 11 = 143 sq ft

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2870 . Shanto was asked to find the value of 7/12 of a sum of money.Instead of multiplying the same by 7/12, he divided it by 7/12 and his answer exceeded the correct answer by 95. The correct answer is

A. 48
B. 89
C. 84
D. 69
E. 49

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Answer: Option E

Explanation:

Let , Money = x

x/(7/12) - x * (7/12) = 95

x* 12/7 - 7x / 12 = 95

( 12x * 12 - 7x * 7 ) / 84 = 95

95x = 95 * 84

x = 84

84 * 7/12 = 49

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Bangladesh Bank - Assistant Director - 2010

A. 32°C
B. 36.5°C
C. 37.5° C
D. 38.2°C

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Answer: Option D

Explanation:

আমরা জানি,
ফারেনহাইট ও সেলসিয়াস স্কেলের মধ্যে সম্পর্ক -
C5=F−329�5=�-329
⇒ C5=100.7−329⇒ �5=100.7-329
⇒ C5=68.79⇒ �5=68.79
⇒ C=38.166⇒ �=38.166
⇒ C= 38.2°C

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সমন্বিত ৪ ব্যাংক - সহকারী প্রোগ্রামার - 25.09.2020

A. 30
B. 40
C. 50
D. 60

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Answer: Option C

Explanation:

We know,
Total = N(A) + N(B) - N(A∩B) + None.
⇒ 420 = 200 + 270 - N(A∩B) + 0
⇒ N(A∩B) = 470 - 420
⸫ N(A∩B) = 50

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Assistant Director (General) 06.07.18

A. k/m
B. m/k
C. (m-k)/m
D. none

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Answer: Option C

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2874 . Simple interest on a certain sum at the rate of 4.5% p.a. for 4 years and 6 years differs by BDT 216. The sum is-

A. BDT 2100
B. BDT 2400
C. BDT 1800
D. None of these

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Answer: Option B

Explanation:

Let the principal amount be P.

According to the question, the simple interest for 4 years and 6 years at 4.5% per annum are:

SI(4 years) = (P × 4 × 4.5) / 100 = 0.18P

SI(6 years) = (P × 6 × 4.5) / 100 = 0.27P

The difference between the two interests is given as BDT 216. Therefore, we can write:

SI(6 years) - SI(4 years) = 0.27P - 0.18P = 0.09P = 216

Solving for P, we get:

P = 216 / 0.09 = 2400

Hence, the principal amount is BDT 2400.

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

B. 1/2
C. -1/2
D. √3/2

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Answer: Option A

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2876 . Since 1965 Mr. Ajmal has gained 2 pounds every year. In 1995 he was 40% heavier than what he was in 1965. What percent of his weight in 2010 was his weight in 1995?

A. 80%
B. 85%
C. 87.5%
D. 90%
E. None of these

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Answer: Option C

Explanation:

1965 to 1995 or 30 yrs, - - - - Gains 30*2 = 60 lb

1995 to 2010 or 15 yrs, - - - - Gains 15*2 = 30 lb

Now, 40% is equivalent to 60 lb

Then, 100% is equivalent to 60*100/40 = 150 lb

That is, in 1965 his weight was 150 lb;

So, in 1995 = 150 + 60 = 210 lb;

And in 2010 = 210 + 30 = 240 lb

Required percent = (210/240)*100 = 87.5% (Ans.)

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2877 . Six bells commence tolling together and toll at intervals of 2,4,6,8,10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?

A. 4
B. 10
C. 15
D. 16
E. None of these

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Answer: Option C

Explanation:

The L.C.M of 2, 4, 6, 8, 10, 12 = 120

So, after 120 seconds later they toll together.

Now,

At 120 seconds toll it 1 times

At 1 seconds toll it 1/120 times

At 1800 seconds toll it ( 1800/120) = 15 times

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2878 . Six consecutive whole numbers are given. The sum of the first three numbers is 27. What is the sum of the last three numbers?

A. 36
B. 33
C. 32
D. 30
E. None of these

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Answer: Option A

Explanation:

Let,

Numbers are n, n + 1, n + 2

ATQ,

n + n + 1 + n + 2 = 27

Or, 3n + 3 = 27

Or, 3n = 24

Or, n = 8

So, the numbers are - 8,9,10

Now, the last 3 consecutive numbers are 11,12,13

Sum of them 11 + 12 + 13 = 36

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2879 . Six consecutive whole numbers are given; the sum of the first three numbers is 27. What is the sum of the last three numbers?

A. 36
B. 33
C. 32
D. 30

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Answer: Option A

Explanation:

Let,

Numbers are n, n + 1, n + 2

ATQ,

n + n + 1 + n + 2 = 27

Or, 3n + 3 = 27

Or, 3n = 24

Or, n = 8

So, the numbers are - 8,9,10

Now, the last 3 consecutive numbers are 11,12,13

Sum of them 11 + 12 + 13 = 36

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2880 . Six men can earn as much as eight women ,two women can earn earn as much as three boys and four boys can earn as much as five girls.If a girl can earn Tk. 50 a day , what amount can a man earn in a day?

A. TK.115
B. Tk.125
C. Tk.135
D. Tk.150

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Answer: Option B

Explanation:

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2866 . Sellling 12 pen at a price of Tk 10 yields a loss of a% Selling 12 pen at a price of Tk 12 yields a profit of a%. What is the value of a?

2867 . Set X contains 10 consecutive integers. If the sum of the 5 smallest members of set X is 265, what is the average of the 5 largest members of Set X?

2868 . Seven friends are having lunch together in a fast food shop. Each of them east at least 3/5th of a pizza. What is the smallest number of whole pizzas needed for their lunch?

2869 . Shahin has purchased a square sheet of plywood of 169 square feet area. To cover a wall he must cut off two feet from a side. What is the area, in square feet of the wall?

2870 . Shanto was asked to find the value of 7/12 of a sum of money.Instead of multiplying the same by 7/12, he divided it by 7/12 and his answer exceeded the correct answer by 95. The correct answer is

2871 . Shehnaz has to record temperature of a covid-19 patient in Celsius but hard thermometer reads Fahrenheit. The patient's temperature is 100.7° Fahrenheit. What is the temperature in Celsius?

2872 . Shonghoti and Shouhardo Clubs consist of 200 and 270 members respectively. If the total member of the two clubs is 420 then how many members belong to both clubs?

2873 . Siam needs m minutes to do a task. After he works for k minutes, what part of the task remains incomplete?

2874 . Simple interest on a certain sum at the rate of 4.5% p.a. for 4 years and 6 years differs by BDT 216. The sum is-

2875 . sin 1260° = ?

2876 . Since 1965 Mr. Ajmal has gained 2 pounds every year. In 1995 he was 40% heavier than what he was in 1965. What percent of his weight in 2010 was his weight in 1995?

2877 . Six bells commence tolling together and toll at intervals of 2,4,6,8,10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?

2878 . Six consecutive whole numbers are given. The sum of the first three numbers is 27. What is the sum of the last three numbers?

2879 . Six consecutive whole numbers are given; the sum of the first three numbers is 27. What is the sum of the last three numbers?

2880 . Six men can earn as much as eight women ,two women can earn earn as much as three boys and four boys can earn as much as five girls.If a girl can earn Tk. 50 a day , what amount can a man earn in a day?

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