1456 . At a room temprature, backterium doubles in every 20 minutes. In 2 hours the total number of backterium from an initial number of 3 will be:

A. 18
B. 96
C. 144
D. 192

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Answer: Option D

Explanation:

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1457 . At a selling price of Tk.273 a book yields 30% profit. What selling price (in taka) will yield the profit of 10%?

A. 210
B. 231
C. 221
D. 235

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Answer: Option B

Explanation:

At 30% profit ,

If selling price is Tk.130 then cost is Tk.100

If selling price is Tk 273 then cost is Tk = (100×273)/130 = Tk.210

Selling price = 210 + 210 ×10% = 210 + 21 = 231

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Agrani Bank Ltd. Recruitment Test for Senior Officer 12.02.2010

A. Tk 24 extra
B. Tk 10 extra
C. Tk 10 less
D. Tk 24 less
E. None of these

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Answer: Option B

Explanation:

12 orange one have to pay 216 Tk

1 oranges one have to pay 216/12 tk

5 orange one have to pay ( 216×5)/12 tk = 90 tk

Mimi paid ( 100 - 90) Tk or 10 Tk extra.

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1459 . At present, the ratio between the ages Karim and Rahim is 4 : 3. After 6 years, Karim's age will be 26 years. What is the age of Rahim at present?

A. 12 years
B. 15 years
C. 20 years
D. 21 years

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Answer: Option B

Explanation:

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পূবালী ব্যাংক লিমিটেড || সিনিয়র অফিসার (30-09-2023) || 2023

A. 56 and 14 years
B. 40 and 10 years
C. 32 and 8 years
D. 36 and 9 years

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Answer: Option D

Explanation:

Let, Father’s age be F and son’s age be S
F = 4S
and, (F - 6) = 10(S - 6)
 4S - 6 = 10S - 60
 6S = 54
S = 9,F = 36

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Bangladesh Bank - Officer - 2015

A. 7
B. 16
C. 9
D. 5

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Answer: Option A

Explanation:

Hints: ধরি, x বছর পূর্বে লিলির বয়স মিলির বয়সের দ্বিগুন ছিলো ।

( 23 - x) = 2 ( 15 - x)

23 - x = 30 - 2x

2x - x = 30 - 23

x = 7

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1462 . At present the total age of Rahim, Karim and Akkas is 81 years. what was their average age three years ago?

A. 78 years
B. 72 years
C. 24 years
D. 29 years
E. None of these

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Answer: Option C

Explanation:

Present total age of 3 person  =  81 
3 years ago total age of 3 person  =  81       –       3      –      3      –       3  =  72 
So, their average age 3 years ago  =  72   +  3  =  24 years.

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1463 . At the same time that a 60-feet tall building casts a shadow that 21.5 feet long, a nearby tree casts a shadow that is 18 feet long. Which measure is closet to the height of the tree?

A. 56.5 ft
B. 50.2 ft
C. 6.5 ft
D. 3.3 ft

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Answer: Option B

Explanation:

Two similar right angle triangles can be drawn from the given information.

Now, height of the tree/height of the building = shadow of the tree/ shadow of the building

Therefore, height of the tree = (18/21.5) x 60 = 50.2

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1464 . At what rate of compound interest per annum will a sum of Tk. 1200 become Tk. 1348.32 in 2 years?

A. 6%
B. 6.5%
C. 7%
D. 7.5%

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Answer: Option A

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1465 . At what rate of compound interest rate per annual will a sum of Tk. 1200 become Tk. 1348.32 in 2 years?

A. 6%
B. 6.5%
C. 7%
D. 7.5%

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Answer: Option A

Explanation:

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1466 . At what rate of profit a principle becomes Tk. 460 with simple profit in 3 years and Tk. 600 with simple profit in 5 years?

A. 20%
B. 24%
C. 28%
D. 32%

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Answer: Option C

Explanation:

৫ বছরের সুদাসল = ৬০০ টাকা
৩ বছরের সুদাসল = ৪৬০ টাকা
২ বছরের সুদাসল = (৬০০ - ৪৬০) = ১৪০ টাকা
১ বছরের সুদাসল = ১৪০/২ = ৭০ টাকা
৩ বছরের সুদাসল = ৭০ × ৩ = ২১০ টাকা
আসল = ৪৬০ - ২১০ = ২৫০ টাকা
২৫০ টাকার সুদ = ৭০ টাকা
১ টাকার সুদ = ৭০/১৫০ = ৭/২৫ টাকা
১০০ টাকার সুদ = (৭ × ১০০)/২৫ = ২৮%

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প্রধান প্রশাসনিক কর্মকর্তার কার্যালয় ( প্রতিরক্ষা মন্ত্রণালয়) সহকারী পরিচালক ০৫.০৪.২০১৯

1467 . At $x = 0,$ the value of $f (x) = e - x^{2}$ is equal to-

A. $1$
B. $3$
C. $2$
D. $5$

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Answer: Option A

Explanation:

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সমন্বিত ৮টি ব্যাংক ও ১টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার (16-05-2025)

A. 1:4
B. 4:1
C. 2:1
D. 1:2
E. None of these

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Answer: Option A

Explanation:

Sales : gross profit = 4 : 3

gross profit : net profit = 3 : 1

sales : gross : net = 4 : 3 : 1

net : sales = 1 : 4

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1469 . Aunik, Kamal and Jamal invested TK. 8000, TK. 4000 and TK. 8000 respectively in a business . Aunik left after six months. If after eight months, there was a gain of TK. 4005, then what will be the share of Kamal?

A. TK. 890
B. TK. 1335
C. TK. 1602
D. TK. 1780

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Answer: Option A

Explanation:

Aunik's share=8000×6=48000 [as he left after 6 months]
Kamal's share=4000×8=32000
Jamal's share=8000×8=64000

Ratio = 48000 : 32000 : 64000
= 48 : 32 : 64
= 3 : 2 : 4

Total = 3+2+4 = 9
Total profit = 4005

∴ Kamal's profit = (2÷9) X 4005 = Tk. 890 (Ans:)

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Bangladesh Bank - Assistant Director - 2016

A. Tk. 5400
B. Tk. 7200
C. Tk. 8400
D. Tk. 9600

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Answer: Option C

Explanation:

Anam's share = 35000 / ( 22500 + 35000) × 13800 = 8400tk.

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1456 . At a room temprature, backterium doubles in every 20 minutes. In 2 hours the total number of backterium from an initial number of 3 will be:

1457 . At a selling price of Tk.273 a book yields 30% profit. What selling price (in taka) will yield the profit of 10%?

1458 . At a store, Mimi paid Tk 100 for 5 oranges. If oranges are usually sold at Tk 216 per dozen, how much extra/less did she pay?

1459 . At present, the ratio between the ages Karim and Rahim is 4 : 3. After 6 years, Karim's age will be 26 years. What is the age of Rahim at present?

1460 . At present , father's age is 4 times more than that of his son . 6 years ago father's age was 10 times more than of his son. What is their present age?

1461 . At present Lili is 23 years old and Medrin is 15 years old. How many years ago was Lili twice as old as Mehrin?

1462 . At present the total age of Rahim, Karim and Akkas is 81 years. what was their average age three years ago?

1463 . At the same time that a 60-feet tall building casts a shadow that 21.5 feet long, a nearby tree casts a shadow that is 18 feet long. Which measure is closet to the height of the tree?

1464 . At what rate of compound interest per annum will a sum of Tk. 1200 become Tk. 1348.32 in 2 years?

1465 . At what rate of compound interest rate per annual will a sum of Tk. 1200 become Tk. 1348.32 in 2 years?

1466 . At what rate of profit a principle becomes Tk. 460 with simple profit in 3 years and Tk. 600 with simple profit in 5 years?

1468 . At XYZ Company, the ratio sales to gross profit is 4:3 and the ratio of gross profit to net profit is 3:1, what is the ratio of net profits to sales?

1469 . Aunik, Kamal and Jamal invested TK. 8000, TK. 4000 and TK. 8000 respectively in a business . Aunik left after six months. If after eight months, there was a gain of TK. 4005, then what will be the share of Kamal?

1470 . Aunik and Anam started a business investing Tk. 22,500 and Tk. 35,000 respectively. Out of a total profit of Tk. 13,800, Anam's share is :

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