4006 . A students first reduced a number by 20% and then increased it again by 20% . If the difference between the last number and the original number is 8, then the original number was :

A. 200
B. 250
C. 300
D. 450
E. 400

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Answer: Option A

Explanation:

Let, the original number = 100
20% reduced = 100 - 100 of 20% = 80
Then, 20% increased = 80 + 80 of 20% = 96
The difference = 96-80 = 16
16 difference then original number = 100
1 difference then original number = 100/16
8 difference then original number = (100×8)/16 = 50

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Bangladesh Bank - Assistant Director - 2013 ||

A. 82
B. 85
C. 79
D. 78.75

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Answer: Option A

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বাংলাদেশ ব্যাংক || সহকারী পরিচালক 28-10-2022

A. 2 meter
B. 4 meter
C. 6 meter
D. 8 meter

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Answer: Option B

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বাংলাদেশ ব্যাংক || সহকারী পরিচালক 28-10-2022

A. Tk.200
B. Tk.216
C. Tk.250
D. Tk.376

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Answer: Option A

Explanation:

At 10% loss so 90% = 216 then 100% = 240

at 20% profit so 120% = 240 then 100% = 200 taka

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

A. 50%
B. 75%
C. 80%
D. 125%

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Answer: Option D

Explanation:

Let's calculate the cost price (CP) and selling price (SP) for the mangoes:

Cost Price (CP) of 15 mangoes = Tk. 10 Cost Price (CP) of 1 mango = Tk. 10 / 15 = Tk. 2/3

Selling Price (SP) of 10 mangoes = Tk. 15 Selling Price (SP) of 1 mango = Tk. 15 / 10 = Tk. 3/2

Now, let's calculate the profit percentage:

Profit per mango = Selling Price (SP) per mango - Cost Price (CP) per mango Profit per mango = (Tk. 3/2) - (Tk. 2/3) Profit per mango = (3/2) - (2/3) Profit per mango = (9/6) - (4/6) Profit per mango = (5/6)

Now, calculate the profit percentage:

Profit Percentage = (Profit per mango / Cost Price per mango) * 100 Profit Percentage = [(5/6) / (2/3)] * 100 Profit Percentage = [(5/6) * (3/2)] * 100 Profit Percentage = (15/12) * 100 Profit Percentage = (5/4) * 100 Profit Percentage = 125%

So, the shopkeeper earns a profit of 125%

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4011 . A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article . Find his profit percent if the article is sold at marked price allowing no discount .

A. 30%
B. 37%
C. 23%
D. 27%

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Answer: Option A

Explanation:

Let the cost price = Tk.100

Therefore, Selling price = 100×117100 = Tk.117100×117100 = Tk.117

Therefore, Marked price = 117×10090 = 130117×10090 = 130

Therefore, Profit Percentage = (130−100)100×100 = 30%

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

A. 45: 56
B. 45:51
C. 47 : 56
D. 47 : 51

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Answer: Option A

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

A. 32 %
B. 36 %
C. 47 %
D. 51 %

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Answer: Option C

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বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২

A. Tk. 198
B. Tk. 216
C. Tk. 220
D. Tk. 230

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Answer: Option B

Explanation:

Wholesale cost of video recorder = 200 $
Video recorder was priced at 20 percent above 200 = 240 $

% discount given by store employee = 10
Emlpoyee paid = .9 * 240 = 216 $

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সমন্বিত ৯ ব্যাংক | 07-01-2022 ||

A. 30%
B. 20%
C. 40%
D. 50%

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Answer: Option D

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

A. The mean only
B. The median only
C. The standard deviation only
D. The mean and median only
E. The mean and the standard deviation only

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Answer: Option D

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Bangladesh Bank - Assistant Director - 2011

A. Tk. 200
B. Tk. 240
C. Tk. 480
D. Tk. 960

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Answer: Option B

Explanation:

area of rectangular floor = 8*10 = 80 meter-meter

area of carpet = 2*2 = 4 meter-meter

number of carpet needed = 80/4 = 20

So, the total cost to cover the floor = 20*12 = 240 tk (Ans)

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4018 . A pump can fill a tank with water in 2 hours . Because of a leak , it took 213213 hours to fill the tank.The leak can drain all the water of the tank in -

A. 4 ( 1 3 ) hours
B. 14 hours
C. 7 hours
D. 8 hours

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Answer: Option B

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4019 . A popular website requires users to create a password consisting of digits only. If no digit may be repeated and each password must be at least 9 digits long, how many passwords are possible ?

A. 9!+10!
B. 2 × 10!
C. 9! × 10!
D. 9!

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Answer: Option B

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প্রবেশনারি অফিসার | 02-04-2022

A. 23
B. 20
C. 22
D. 21

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Answer: Option A

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Assit. Programmer | Sonali Bank- Rubali Bank- BD Krishi Bank - 16.11.2018

4006 . A students first reduced a number by 20% and then increased it again by 20% . If the difference between the last number and the original number is 8, then the original number was :

4007 . A student obtained 60, 75 and 85 marks respectively in 3 monthly examinations in physics and 95 marks in the final examination. The 3 monthly examinations are of equal weightage whereas the final examination is weighted . What is his average mark physics?

4008 . A square room has a square carpet symmetrically placed in it. This leaves an uncovered area of 9 meter2. The area of the whole romm is 25 meter2 . What is the length of the one side the carpet?

4009 . A sold a watch to B at a gain of 20% and B sold it to C at loss of 10%. If C bought the watch for TK.216 at what price did A purchase it?

4010 . A shopkeeper purchase 15 mangoes for Tk. 10 and sells them at 10 mangoes for Tk. Thus, he earns a profit of-

4011 . A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article . Find his profit percent if the article is sold at marked price allowing no discount .

4012 . A shopkeeper earns a profit of 12% on selling a book at 10% discount on the printed price. The ratio of the cost price and the printed price of the book is -

4013 . A school has a total of 90 students. There are 30 students taking Physics, 25 taking English, and 13 taking both. Approximately what percentage of the students is taking either Physics of English?

4014 . A retail appliance store priced a video recorder at 20 precent above the wholesale cost of Tk. 200. If a store employee applied the 10 percent employee discount to the retail price to buy the recorder, how much did the employee pay for the recorder?

4015 . A restaurant makes 20% profit after selling a set menu at a discount of 20% . What is the percentage increase of marked price?

4016 . A researcher computed the mean , median and standard deviation for a set of performance score . If 5 were to be added to each score , which of these three statistics would change ?

4017 . A rectangular floor that measures 8 meters by 10 meters is to be covered with carper that each measure 2 meters by 2 meters. If the carpet cost Tk. 12 a piece, what is the total cost to cover the floor?

4018 . A pump can fill a tank with water in 2 hours . Because of a leak , it took 213213 hours to fill the tank.The leak can drain all the water of the tank in -

4019 . A popular website requires users to create a password consisting of digits only. If no digit may be repeated and each password must be at least 9 digits long, how many passwords are possible ?

4020 . A polygon with 25 sides a can be triangulated into ___

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