601 . 3 liters of water is added to 15 liters of mixture of a 20% solution of alcohol in water. The strength of alcohol is now--

A. 24%
B. 16%
C. 25/2%
D. 50/3%

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Answer: Option D

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602 . 3 men or 5 women or 8 boys can finish a work in 38 days. How many days will be required to complete the same work by 6 men , 10 women and 6 boys together ?

A. 5
B. 6
C. 7
D. None of these

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Answer: Option D

Explanation:

Work done by 3 men = 5 women = 8 boys
1 man = 8/3 boys
6 men = 16 boys
1 woman = 8/5 boys
10 women = 16 boys
Now, 6 men + 10 women + 6 boys = 16 + 16 + 6 = 38 boys
8 boys need 38 days
1 boy needs (38x8) days
So, 38 boys need (38x8)/38 = 8days

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603 . 3 pumps , working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day ?

A. 10
B. 11
C. 12
D. 9

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Answer: Option C

Explanation:

3 pumps 2 days empties by working 8 hrs

1 " 2 " " " " ( 8 × 3) hrs

1 " 1 " " " " ( 8 × 3 × 2) hrs

4 " 1 " " " " ( 8 × 3 × 2) /4 hrs

= 12 hrs

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Bangladesh Bank - Officer(Cash) - 2016

A. 9
B. 10
C. 11
D. 12

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Answer: Option D

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আশুগঞ্জ পাওয়ার স্টেশন কোম্পানী লিঃ (APSCL) || সহকারী প্রকৌশলী (মেকানিক্যাল ও ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স) (27-09-2024) || 2024

A. 9 hours
B. 10 hours
C. 11 hours
D. 12 hours
E. None of these

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Answer: Option D

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606 . 3 years ago, the average age of a family of 5 members was 17 years. With the birth of a new baby, the average remains the same even today. Find the age of the baby.

A. 1 year
B. 2 year
C. 2.5 year
D. 3 year

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Answer: Option B

Explanation:

3 years ago average age of 5 members is 17 years

Sum of ages of 5 members, 3 years ago ⇒ 17 × 5 = 85

Average of Present age of 5 members = 20 years

Sum of present ages of 5 members = 20 × 5 = 100

But a baby born and average remains same i.e 17 years

Sum of present ages of 6 members = 17 × 6 = 102

Age of baby = 102 - 100 = 2 years

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NRBC BANK PO/TAO (16-06-2023) || 2023

607 . 3.12 marbles are selected at random form a large collection of white, red, green and yellow marbles. The number of marbles of each color is unlimited. Find the probability that the selection contains at least one marble of each color?

A. $\frac{34}{91}$
B. $\frac{23}{31}$
C. $\frac{36}{91}$
D. $\frac{33}{91}$

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Answer: Option D

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Sonali- Rupali- Bangladesh Krishi- Rajshahi krishi unnayn-Investment Corporation of Bangladesh | 30.11.2018

A. 1:4
B. 3:16
C. 1:2
D. 3:4

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Answer: Option D

Explanation:

A Shape এর মান = ৩/৪ অংশ

B Shape এর মান হবে= (১ - ৩/৪)= ১/৪ অংশ

অতএব, C Shape এর মান হবে= ৩/৪ × ১/৪ = ৩/১৬

C Shape এর ১ অংশ : B Shape এর ১ অংশ

= ৩/১৬ : ১/৪

= ৩ : ৪

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Sonali &amp- Janata Bank Ltd. Senior Officer (IT/ICT) 08.06.2018

A. 125
B. 315
C. 240
D. 180

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Answer: Option B

Explanation:

450×(70/100)

= 315

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610 . 30% of 80 is what percent of 24?

A. 1
B. 10
C. 50
D. 100

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Answer: Option D

Explanation:

x% of 24 = 30% of 80

So, x = 30 x 80 / 24 = 100.

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611 . 30 = ?

B. 3
C. 1
D. 2

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Answer: Option A

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612 . 30 labourers, working 7 hours a day can finish a piece of work in 18 days. If the ladourers work 6 hours a day, then the number of labourers to finish the same piece of work in 30 days, will be.

A. 15
B. 22
C. 21
D. 25

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Answer: Option C

Explanation:

In 18 days working 7 hours a day can finish 30 labours

In 30 days working 6 hours a day can finish = ( 18×30×7)/ ( 30×6) = 21

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613 . 30 men took a dip in a water tank 20m long and 15m broad on a religious day.If the aveage water displacement of water by a man is 2m3, then the rise in the water level in the tank will be --

A. 20 cm
B. 50 cm
C. 100 cm
D. 200 cm

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Answer: Option A

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614 . 30 pens and 75 pencils altogether were purchased for Tk. 510. If the speed of the stream is 3 km / hr then find time taken by boat to travel 52 km downstream.

A. 2 hrs
B. 4 hrs
C. 5 hrs
D. 9 hrs

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Answer: Option D

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Two Combined Bank Recruitment Test - Officer 28.09.2018 ||

A. 5 :7
B. 4 :7
C. 7 : 3
D. 4 : 3

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Answer: Option A

Explanation:

ধরি, নাবিলার মোট উপার্জন = x টাকা

এবং, নুরুর মোট উপার্জন = y টাকা

প্রশ্নমতে, 35%x = 25%y

35x/100 = 25y/100

x/y = 25/35

x/y = 5/7

x : y = 5 : 7

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601 . 3 liters of water is added to 15 liters of mixture of a 20% solution of alcohol in water. The strength of alcohol is now--

BdMerit-এর ১ বছরের প্রিমিয়াম প্যাকেজ কিনে ১০ মাস নিয়মিত প্রস্তুতি নিন—

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602 . 3 men or 5 women or 8 boys can finish a work in 38 days. How many days will be required to complete the same work by 6 men , 10 women and 6 boys together ?

603 . 3 pumps , working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day ?

604 . 3 pumps working 8 hours a day can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

605 . 3 pumsps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the same tank in 1 day?

606 . 3 years ago, the average age of a family of 5 members was 17 years. With the birth of a new baby, the average remains the same even today. Find the age of the baby.

608 . 3/4th of square were taken to form shape A and the rest was made to form shape B. Shape A was divided into four equal squares (Shape C), what will be the ratio of the one shape C to one shape B.

609 . 30% apples out of 450 are rotten . How many apples are in good condition?

610 . 30% of 80 is what percent of 24?

611 . 30 = ?

612 . 30 labourers, working 7 hours a day can finish a piece of work in 18 days. If the ladourers work 6 hours a day, then the number of labourers to finish the same piece of work in 30 days, will be.

613 . 30 men took a dip in a water tank 20m long and 15m broad on a religious day.If the aveage water displacement of water by a man is 2m3, then the rise in the water level in the tank will be --

614 . 30 pens and 75 pencils altogether were purchased for Tk. 510. If the speed of the stream is 3 km / hr then find time taken by boat to travel 52 km downstream.

615 . 35% of Nabila's income is equal to 25% of Nuru's income. The ratio of their income is

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