76 . XYZ company sold 800 units of watches for TK.800 each and 1,000 units of watches for TK. 500 each. If the company's cost of producing each unit of watch was TK. 600, what was the company's profit or loss ?

A. TK. 1,600 loss
B. TK. 600 loss
C. No profit or loss
D. TK. 600 profit
E. None of these

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Answer: Option E

Explanation:

SP=800×800=640000 taka

CP=800×600=48000 taka

Profit=640000-480000=160000 taka

Again,

SP=1000×500=500000 taka

CP=1000×600=600000 taka

Loss=600000-500000=100000 taka

So, Net profit=160000-100000=60000 taka

(ans)

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77 . x=15 ও y=5 হলে x^3-3x^2y+3xy^2-y^3 = ?

A. ১০০০
B. ১২০০
C. ১৪০০
D. ৮০০

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Answer: Option A

Explanation:

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78 . x/2+3 = x/3+4. In this equation what is the value of x?

A. 7
B. 6
C. 5
D. 4
E. None of them

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Answer: Option B

Explanation:

x/2 + 3 = x/3 + 4

or, x/2 - x/3 = 4 - 3

or, (3x - 2x)/6 = 1

∴ x = 6

ans: 6

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Sonali- Janata- Agrani &amp- Rupali Bank Ltd. Senior Officer Recruitment 14.03.2008

A. 3
B. 9
C. 1/5
D. 1/9

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Answer: Option D

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80 . X sells an item to Y at a profit of 28% on his cost and sells the same item to Z at a loss of 25% on his cost. If Y thus sold the item to Z a Tk. 2 less than the item to X, then what is the cost of the item to X?

A. TK. 200
B. TK. 150
C. TK. 100
D. TK. 50

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Answer: Option D

Explanation:

Purchase price of X = x

Selling price of Y =1.28x

Z=0.75 of 1.28x= 0.96x

ATQ,

0.75 of 1.28x=x-2

Or, 0.96x=x-2

So, x=50

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বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২

A. 210
B. 175
C. 140
D. 126
E. 200

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Answer: Option C

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Bangladesh Bank - Officer(Cash) - 2011

A. 6
B. 8
C. 10
D. 12

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Answer: Option B

Explanation:

Let the number of pens be N.

Then, price of each pen = 120/N

He would get (N + 2) pens if the price of each pen was [120/N - 3].

So, 120 / (N + 2) = (120/N) - 3

or, 120 / (N + 2) = (120 - 3N) / N

or, 120N = (120 - 3N) (N + 2)

or, 120N = 120N + 120 x 2 - 3N2 - 3N x 2

or, 3N2 + 6N + 120N - 120N - 240 = 0

or, 3N2 + 6N - 240 = 0

or, N2 + 2N - 80 = 0

or, N2 + 10N - 8N - 80 = 0

or, N(N + 10) - 8(N + 10) = 0

or, (N + 10) (N - 8) = 0

or, N - 8 = 0 [N + 10 = / 0]

So, N = 8

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83 . X number of students in a class agreed to donate a total of Tk. Z to a charity. If 4 students drop out, how much more will each of the rest have to contribute so that the total donation remains the same?

A. Z/4-X
B. 4Z/(X2-4X)
C. Z/(X=4)
D. none

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Answer: Option B

Explanation:

ব্যাখাঃ

x শিক্ষার্থীর প্রত্যেকে চাঁদা দেয় z/x টাকা

(x - 4) শিক্ষার্থী প্রত্যকে চাঁদা দেয় = z/ x - 4 টাকা

বেশি চাদার পরিমান = z/x - 4 - z/x = 4z / x² - 4x

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84 . X is west of Y and Y is North of Z. M is south of X. Which direction is M to Z ?

A. West
B. South
C. North
D. East

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Answer: Option A

Explanation:

Y এর পশ্চিমে X এবং Z এর উত্তরে Y. X এর দক্ষিণে M

থেকে Z কোন দিকে ?

M is West of Z.

তাই উত্তর হবে b) West.

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Bangladesh Bank - Assistant Director - 2010

A. 22 days
B. 60 days
C. 20 days
D. 25 days

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Answer: Option B

Explanation:

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86 . X can do a piece of work in 24 days. When he had worked for 4 days, Y joined him. If the work was completed in 16 days, Y alone can finish that work in:

A. 18 Days
B. 27 Days
C. 36 Days
D. 42 Days

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Answer: Option C

Explanation:

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Uttara Bank PLC || Probationary Officer (09-11-2024) || 2024

A. 15 days
B. 20 days
C. 10 days
D. 12 days

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Answer: Option C

Explanation:

y can do in 1 day = 1/(7x5) = 1/35
x & y can do in 1 day = 1/20 + 1/35 = 11/140
Now,
11/140 work is done in 1 day
So, 1 work is done in 140/11 day
So, 11/14 work is done in (140x11)/(11x14) = 10 days.

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Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

88 . X and Y start a business by investing a certain amount in the ratio 9:16. Both of them invest for an equal period of time. At the end of the term, X's share of profit is what per cent less than that of Y?

A. $62 \frac{1}{2}$
B. $60$
C. $55 \frac{2}{3}$
D. $43 \frac{3}{4}$

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Answer: Option D

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Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

A. Tk. 45,000
B. Tk. 50,000
C. Tk. 60,000
D. Tk. 80,000

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Answer: Option C

Explanation:

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90 . x = 2y + 3 and y = -2 ; Quantity A = x and Quantity B = -1

A. Quantity A is greater
B. Quantity B is greater
C. The two quantities are equal
D. The relationship cannot be determined from the information given

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Answer: Option C

Explanation:

x = 2y + 3

y = - 2

x = 2 ( - 2) + 3 = - 1

A = x = - 1.

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Bangladesh Bank - Assistant Director - 2009

76 . XYZ company sold 800 units of watches for TK.800 each and 1,000 units of watches for TK. 500 each. If the company's cost of producing each unit of watch was TK. 600, what was the company's profit or loss ?

77 . x=15 ও y=5 হলে x^3-3x^2y+3xy^2-y^3 = ?

78 . x/2+3 = x/3+4. In this equation what is the value of x?

79 . x varies inversely as square of y. Given that y=2 for x=1. The value of x for y=6 will be equal is-

80 . X sells an item to Y at a profit of 28% on his cost and sells the same item to Z at a loss of 25% on his cost. If Y thus sold the item to Z a Tk. 2 less than the item to X, then what is the cost of the item to X?

81 . x sells a product to y and makes a profit of 25%. Y sells it to z at a loss of 20%. If z buys it for TK. 140, what price did x pay for it?

82 . X purchased some pens for Tk.120. If the price per price of pen was Tk.3 less, he would have received 2 more pens. How many pence did he purchase?

83 . X number of students in a class agreed to donate a total of Tk. Z to a charity. If 4 students drop out, how much more will each of the rest have to contribute so that the total donation remains the same?

84 . X is west of Y and Y is North of Z. M is south of X. Which direction is M to Z ?

85 . X cm complete a certain work in same time in which Y and Z together can do it. If X and Y together can finish it in 10 days and Z alone in 15 days, then Y alone can do it in ?

86 . X can do a piece of work in 24 days. When he had worked for 4 days, Y joined him. If the work was completed in 16 days, Y alone can finish that work in:

87 . x can do a piece of work in 20 days and Y can do the 1/7th of the same work in 5 days. In how many days together they can complete the 11/14th of the total work?

89 . X and Y invested in a business. They earned some profit which they divided in the ratio of 2 : 3. If X invested Tk. 40,000 the amount invested by Y is:

90 . x = 2y + 3 and y = -2 ; Quantity A = x and Quantity B = -1

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