2551 . In redesigning a cold storage, the length is increased by 30%, the breadth is increassed by 50% and the height is reduced by 20%. What is the net increase in the volume of the redesigned cold storage compared to the previous design?

A. 50%
B. 56%
C. 60%
D. 40%
E. None of them

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Answer: Option B

Explanation:

Shortcut method:

±a±b±(ab/100)

=30+50+(30×50)/100

=95%

Now again,

±a±b±(ab/100)

=95-20-(95×20)/100

=56%

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2552 . In redesigning a werehous, the lenght is increased by 20%, the breadth is increased by 40% and the heightis decreased by 25%. What is the net increase in the volume of the redesigned werehouse compared to the previous design?

A. 40%
B. 26%
C. 15%
D. 20%

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Answer: Option B

Explanation:

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2553 . In Sajib's collection, Bangladeshi stamp is 3 times more than the stamps of other countries . Which of the following cannot be the number of stamps in Sajib's collection ?

A. 96
B. 72
C. 54
D. 32

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Answer: Option C

Explanation:

Stamps must be in an integer.

Let's say, he has x stamps of other countries

So, he has 3x Stamps of Bangladesh

So it has to be, x+3x=54 [In total]

But if we solve the equation, we can see that x=27/2, which is a fraction [not an integer]

So 54 cannot be the number of stamps. (ans)

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2554 . In square ABCD below, if DE = EB and DF = FC, then the area of the shaded region is what fraction of the area of square region ABCD?

A. 1/16
B. 1/8
C. 1/4
D. 1/6

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Answer: Option B

Explanation:

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2555 . In the equation: 31(m - n) - 32(m - n) + (m - n) =?

A. -n
B. -m
D. 1

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Answer: Option C

Explanation:

31(m-n) - 32(m-n) + (m-n)

= 31m - 31n - 32m + 32n + m - n

= 0

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2556 . In the Excel Manufacturing Company, 46 percent of the employees are men. If 60 percent of the employees are unionized and 70 percent of these are men, what percent of the non-unionized workers are women?

A. 90%
B. 87.5%
C. 66.7%
D. 50%

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Answer: Option A

Explanation:

Let X% of the non - unionized employees be men.

Percentage of non - unionized employees = 100% - 60% = 40%

Percentage of unionized men employees = 70% of 60% = 42%

Now, % unionized men employees + % of non - unionized men employees = 46%

or, 42% + X% of 40% = 46%

or, X% of 40% = 46% - 42% = 4%

or, X/100 = 4/40

So, X = 1/10×100 = 10

So, percentage of non - unionized women employees = 100% - 10% = 90%

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2557. In the figure, AB and AC are radii of two circles. Length of BC is 6. If AB = 4, what is AC? AC is tangent to the circle with centre B.

A. 2 √ 5
B. 5.5
C. 3 √ 5
D. 3 √ 2

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Answer: Option A

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Bangladesh Bank - Assistant Director - 2011

2558 . In the figure, AD and BC are lines intersecting at O. What is the value of a?

A. 30
B. 40
C. 15
D. 60

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Answer: Option C

Explanation:

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জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) || 2024

A. 1:2
B. 1 √ 2
C. 1:3
D. 1 √ 3

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Answer: Option D

Explanation:

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বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২

A. 12
B. 11
C. 13
D. 17

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Answer: Option D

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2561 . In the figure, what is the value of a?

A. 30
B. 45
C. 72
D. 60

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Answer: Option C

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2562 . In the figure above, if the perimeter of $∆$ vzy is 17, what is the area of square region vwxy?

A. 36
B. 64
C. 100
D. 49

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Answer: Option D

Explanation:

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জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) || 2024

2563. In the figure at the right end, PS is perpendicular to QR. IF PQ=PR and PS = 24, then QR=?

A. 20
B. 18
C. 16
D. 14

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Answer: Option A

Explanation:

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Bangladesh Bank - Officer - 2015

A. 48
B. 32
C. 24
D. 16

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Answer: Option B

Explanation:

There is no need to even apply the formula for area of the triangle.

Since location of point T is not defined, we can assume it to be anywhere.

Consider point T to coincide with point P. This will divide the squire in 2 equal halves.

Since the area of the squire is 64, the are of triangle will be 64/2 = 32.

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2565. In the figure below, the value of y is

A. 12
B. 24
C. 42
D. 36

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Answer: Option C

Explanation:

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Bangladesh Bank - Officer - 2015

2551 . In redesigning a cold storage, the length is increased by 30%, the breadth is increassed by 50% and the height is reduced by 20%. What is the net increase in the volume of the redesigned cold storage compared to the previous design?

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2552 . In redesigning a werehous, the lenght is increased by 20%, the breadth is increased by 40% and the heightis decreased by 25%. What is the net increase in the volume of the redesigned werehouse compared to the previous design?

2553 . In Sajib's collection, Bangladeshi stamp is 3 times more than the stamps of other countries . Which of the following cannot be the number of stamps in Sajib's collection ?

2554 . In square ABCD below, if DE = EB and DF = FC, then the area of the shaded region is what fraction of the area of square region ABCD?

2555 . In the equation: 31(m - n) - 32(m - n) + (m - n) =?

2556 . In the Excel Manufacturing Company, 46 percent of the employees are men. If 60 percent of the employees are unionized and 70 percent of these are men, what percent of the non-unionized workers are women?

2559 . In the figure, DE is parallel to BC. If the area of a triangle ADE is half that of trapezoid DECB, what is the ratio of AE to AC?

2560 . In the figure, if AB=8, BC =6, AC=10 and CD= 9, then AD= ?

2561 . In the figure, what is the value of a?

2564 . In the figure below, the area of square PQRS is 64. What is the area of triangle QRT?

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