886 . A glass was filled with 10 liters of water and 0.01 liter of water evaporated every day during a 20-day period. What percent of the original amount of water evaporated during this period?

A. 20%
B. 22%
C. 2.2%
D. 2%

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Answer: Option D

Explanation:

Total water evaporated = 0.01×20 = 0.2 liter

Percentage of evaporated water = 0.2 / 10 × 100% = 2%

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887 . A glass when full of milk, weighs one kg. When half full it weighs 3/4 kg; what is the weight of the empty glass?

A. .45 kg
B. 1 kg
C. 0.25 kg
D. 0.5 kg

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Answer: Option D

Explanation:

Weight of 1/2 glass of milk = 1 - 3/4 = 1/4 kg

So, weight of full glass of milk = 2 × 1/4 = 1/2 kg

So, weight of the glass = 1 - 1/2 = 1/2 kg = 0.5 kg

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সমন্বিত ব্যাংক অফিসার (ক্যাশ) || (02-06-2023)

A. 19.25 sq.m
B. 155 sq.m
C. 144 sq.m
D. 38.48 sq.m

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Answer: Option D

Explanation:

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889 . A group of 20 friends formed and investment club, with each member contributing an equal amount to the general fund. The club then invested the entire fund, which amounted to t taka, in stock X. The value of the stock subsequently increased 40 percent, at that point the stock was sold and the proceeds divided evenly among the members. In terms of t, how much money did each member of the club receive from the sale?

A. $800 t$
B. $\frac{t}{2}$
C. $\frac{7 t}{5}$
D. $\frac{7 t}{100}$

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Answer: Option D

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সমন্বিত ১০ ব্যাংক ও আর্থিক প্রতিষ্ঠান || সিনিয়র অফিসার (10-11-2023)

A. 57
B. 67
C. 77
D. 87
E. None of these

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Answer: Option C

Explanation:

Money collected = ( 59.29 ×100) paisa = 5929 paisa

No of numbers = root(5929) = 77

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891 . A hall, 20m long and 15 m broad , is surrounded by a veranda of uniform width of 2.5m. The cost of flooring the verandah at TK. 3.50 per square meter is -

A. Tk. 500
B. TK. 700
C. Tk. 600
D. Tk. 800

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Answer: Option B

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892 . A hat contains 12 cards marked with a star and 18 unmarked cards. What is the probability that one card slelected at random will be marked with a star?

A. 3/5
B. 2/5
C. 2/3
D. 5/2

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Answer: Option B

Explanation:

Total cards=12+18

=30

Star marked card probability=12/30

=2/5 (Ans)

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First Security Islami Bank Ltd | Probationary Officer | 19-02-2021

A. 12%
B. 9%
C. 7.5%
D. 5.25%

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Answer: Option A

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বাংলাদেশ অর্থনৈতিক অঞ্চল কর্তৃপক্ষ (BEZA) | সহকারী ব্যবস্থাপক | ৩০.১১.২০১৮

A. 22.25 min
B. 37.5 min
C. 40 min
D. 65 min
E. None of these

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Answer: Option C

Explanation:

First hawker takes 1.25 hours or 75 minutes and second hawker takes 75 + 15 = 90 minutes.

Together they can finish (1/75 + 1/90) = 11/450 part of the delivery in 1 minute.

So, together they will finish the whole delivery in 1/(11/450) = 450/11 = 40.91 minutes.

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895 . A house-owner was having his house painted. He was advised that he would require 25 kg of paint. Allowing for 15% wastage and assuming that the paint is available in 2 kg cans. What would be the cost of paint purchased, if one can cost Tk.16?

A. 160
B. 360
C. 240
D. 180

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Answer: Option C

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896 . A is 3 years older than B and 3 years younger than C. B and D are twins. How older is C than D?

A. 2 years
B. 3 years
C. 6 years
D. 12 years
E. None of these

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Answer: Option C

Explanation:

যেহেতু A,B অপেক্ষা 3 বছরের বড় এবং C অপেক্ষা 3 বছরের ছোট আবার B এবং D হচ্ছে যমজ। তাই C এর বয়স D অপেক্ষা 3 + 3 = 6 বছর বেশি।

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897 . A is 3 years older than B and 3 years younger than C.B and D are twins How older is C than D

A. 12 years
B. 6 years
C. 3 years
D. Cannot be Determined

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Answer: Option B

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সমন্বিত ব্যাংক অফিসার (ক্যাশ) || (02-06-2023)

A. 11 days
B. 13 days
C. 20x3/17 𝑑𝑎𝑦𝑠
D. None of these

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Answer: Option B

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Bangladesh Bank - Assistant Director - 2016

A. 13 days
B. 15 days
C. 10 days
D. None of these

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Answer: Option A

Explanation:

Ratio of times taken by A and B = 100:130 = 10:13
Suppose B takes x days to do the work.
Then, 10:13 :: 23:x
∴ x = 299/10
A's 1 day's work = 1/23
B's 1 day's work = 10/299

(A+B)'s 1 day's work = (1/23 + 10/299) = 1/13
Therefore, A and B together can complete the work in 13 days.

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

A. 3 km/hr
B. 5 km/hr
C. 4 km/hr
D. 7 km/hr

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Answer: Option C

Explanation:

ধরি, A এর speed x km/hr ; B এর speed =(7-x) km/hr

প্রশ্নমতে, 24/x + 24/7-x= 14

Or, 168-24x + 24x/x(x-7)=14

Or, 168/x(x-7)=14

Or, 98x-14x^2=168

Or, 7x- x^2=12

Or, x^2- 7x + 12= 0

Or, x^2- 4x- 3x -12= 0

Or, x(x-4)-3 (x-4)=0

or, (x-4) (x-3)=0

X-4= 0 অথবা x-3=0

X=4, x=3

অতএব, A is faster than B,

So, A's speed 4 km/hr

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886 . A glass was filled with 10 liters of water and 0.01 liter of water evaporated every day during a 20-day period. What percent of the original amount of water evaporated during this period?

887 . A glass when full of milk, weighs one kg. When half full it weighs 3/4 kg; what is the weight of the empty glass?

888 . A goat is tied to one corner of a square plot of side 12m by a rope 7m long. Find the area it can graze?

890 . A group of students decided to collect as many paisa from each from each member of a group as is th number of members. If the total collection amounts to Tk 59.29 , what is the m=number of members in the group?

891 . A hall, 20m long and 15 m broad , is surrounded by a veranda of uniform width of 2.5m. The cost of flooring the verandah at TK. 3.50 per square meter is -

892 . A hat contains 12 cards marked with a star and 18 unmarked cards. What is the probability that one card slelected at random will be marked with a star?

893 . A hawker buy every 4 oranges at Tk. 25 and then sells every 8 oranges at Tk. 56. What is the percentage of the profit?

894 . A hawker takes 1.25 hours to deliver newspapers on his route. Another hawker takes 15 minutes longer to deliver these papers on the same route. How long would it take to deliver the papers if both of them worked together?

895 . A house-owner was having his house painted. He was advised that he would require 25 kg of paint. Allowing for 15% wastage and assuming that the paint is available in 2 kg cans. What would be the cost of paint purchased, if one can cost Tk.16?

896 . A is 3 years older than B and 3 years younger than C. B and D are twins. How older is C than D?

897 . A is 3 years older than B and 3 years younger than C.B and D are twins How older is C than D

898 . A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?

899 . A is 30% more efficient than E How much time will they , working together , take to complete a job which A alone could have done in 23 days?

900 . A is faster than B,A and B each walk 24km. The sum of their speeds is 7 km/hr and the sum of times taken by them is 14 hours. Then, A's speed is equal to :

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