2536 . In how many years will a sum of money double itself at 12% per annum.

A. 7 years 6 months
B. 8 years 6 months
C. 6 years 9 months
D. 8 years 4 months

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Answer: Option D

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2537 . In June a baseball team that played 60 games had won 30% of its games played . After a phenomenal winning streak this team raised its average to 50% . How many games must the team have won in a row to attain this average?

A. 30
B. 45
C. 20
D. 24

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Answer: Option D

Explanation:

First find 30% of 60=18.

Now you know the team won the next x games, so the number won is 18+x.

The team’s average now is 50%, so find 50% of the new number of games, i.e. 60+x games.

The number won=50% of games played so we get:

18+x=(60+x)/2

Solving this, we find x=24, so they have to win 24 games in a row.

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Three Combined Bank Recruitment - Senior Officer 03 .08.2018 ||

A. Tk.54
B. Tk.48
C. Tk.40
D. Tk.72

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Answer: Option B

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2539 . In mathematics examination, a student scored 30% marks in the first paper out of a total 180. How much should he score in second paper out of a total of 150 if he is to get an overall average of at least 50%--

A. 70
B. 80
C. 74
D. 76

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Answer: Option C

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2540 . In New jersey 90% of the population own a car, 15% own a motorcycle, and everybody owns one or the other or both. What is the percentage of motorcycle owners who own cars?

A. $6 \frac{4}{7} %$
B. $15 \frac{2}{3} %$
C. $33 \frac{1}{3} %$
D. $45 \frac{1}{2} %$

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Answer: Option C

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সমন্বিত ৫ ব্যাংক | অফিসার ক্যাশ | 25-03-2022 ||

A. 3
B. 5
C. 8
D. 9

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Answer: Option C

Explanation:

Hints : Speed in still water = 1/2 (11 + 5) km/hr = 8 km/hr

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2542 . In one hour, a boat goes 11 km/hr along the stream and 5 km/ hr against the stream. What is the speed of the boat in still water?

A. 5 km/hr
B. 8 km/hr
C. 9 km/r
D. 10 km/hr
E. None of these

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Answer: Option B

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2543 . In one year, the population of city increased by 20%. The next year, it decreased by 10%. What was the percentage increase in the population over the two years?

A. 8
B. 10
C. 15
D. none of these

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Answer: Option A

Explanation:

In one year, the population of city increased by 20%. The next year, it decreased by 10%. What was the percentage increase in the population over the two years?

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2544 . In order to obtain an income of Tk. 650 from 10% stock at Tk. 96, one must make an investment of :

A. Tk. 3100
B. Tk. 6240
C. Tk. 6500
D. Tk. 9600

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Answer: Option C

Explanation:

Hints: 10% profit in TK.96 = 96 × 10% = 9.6 TK

If profit 9.6TK. then investment 96 TK

If profit 1 tk then investment 96/9.6 tk

if profit 650 tk then investment 96 × 650/9.6 = 6500 t

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সমন্বিত পাঁচ ব্যাংক || অফিসার ক্যাশ - 06.11.2021

A. 1,350
B. 1,500
C. 1,750
D. 2,000

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Answer: Option B

Explanation:

ATQ, Needed marks to be passed is 381  +  144 = 525
As the student needs 35% of the maxium marks to pass
i.e. 525 =  35% of the maximum marks
So, 35% =  525 marks
     1% =  525/35 marks
   100% =  (525/35)*100 marks
        =  1500 Marks. ANS

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2546 . In Rajshahi 5 adults are unemployed for every 120 who have jobs. Out of 2125 adults how many have jobs?

A. 2040
B. 1896
C. 425
D. 89

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Answer: Option A

Explanation:

Out of every 125, number of job holder = 120

So, out of 2125, number of job holders = 120 x 2125 / 125 = 2040.

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2547 . 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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2548 . 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

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2549 . 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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2550 . 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

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2536 . In how many years will a sum of money double itself at 12% per annum.

2537 . In June a baseball team that played 60 games had won 30% of its games played . After a phenomenal winning streak this team raised its average to 50% . How many games must the team have won in a row to attain this average?

2538 . In making a ratio set the costs of labor and material are in the ratio 3 : 2. A manufacturer sells a set of Tk.150 to make a gain of 25% on the cost. What is the cost of the meterial for the set?

2539 . In mathematics examination, a student scored 30% marks in the first paper out of a total 180. How much should he score in second paper out of a total of 150 if he is to get an overall average of at least 50%--

2541 . In one hour, a boat goes 11 km along the stream and 5 km against the stream. The speed of the boat in still water (in km/hr) is :

2542 . In one hour, a boat goes 11 km/hr along the stream and 5 km/ hr against the stream. What is the speed of the boat in still water?

2543 . In one year, the population of city increased by 20%. The next year, it decreased by 10%. What was the percentage increase in the population over the two years?

2544 . In order to obtain an income of Tk. 650 from 10% stock at Tk. 96, one must make an investment of :

2545 . In order to pass an examination, a student is required to get 35% of the maximum marks. If a student scored a total of 381 marks and failed by 144 marks, determine the maximum marks for the examination.

2546 . In Rajshahi 5 adults are unemployed for every 120 who have jobs. Out of 2125 adults how many have jobs?

2547 . 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?

2548 . 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?

2549 . 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 ?

2550 . 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?

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