 Here are today’s 10 questions for Quantitative Aptitude section of RBI Grade B Officers Phase I exam.

Attempt the following questions from Quantitative Aptitude Section of RBI Grade B. Post your score and answers in the comments section below.

1. At present, the ratio of the ages of a father and his son is 9: 4. However, after 5 years the ratio will become 2: 1. What is the present age of the father?

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B.
C.
D.

Question 1 of 10

2. A man sells an article at a profit of 15%. If he had bought it at 15% less and sold it for Rs. 78 less, he would have gained 20%. What is the cost price of the article?

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Question 2 of 10

3. A tap can fill a cistern in 2 hours and another tap can empty the same in 3 hours. How long will it take to fill the cistern if both the taps are turned on?

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D.

Question 3 of 10

4. Three dice are rolled. The probability of getting the same number on the three dice is

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D.

Question 4 of 10

5. If the difference between compound interest and simple interest on a certain amount for two years is Rs. 7.35 and the rate of interest is 7%, find the principal.

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D.

Question 5 of 10

6. A piece of work can be done by 18 children in 12 days. How many children would be required to do the same work in 8 days?

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B.
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D.

Question 6 of 10

7. In a class of 65 students and 4 teachers, each student got sweets that are 20% of the total number of students and each teacher got sweets that are 40% of the total number of students. How many sweets were there?

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D.

Question 7 of 10

8. On selling an item for Rs 20 a man gains 25%. In order to gain 40% what will be the increase in its selling price.
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D.

Question 8 of 10

9. A man can swim at 10 kmph in still water. If the river flows at 3 kmph and, it takes 12 hours more in upstream than to go downstream for the same distance, then how far is the place?

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Question 9 of 10

10. A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is:
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D.

Question 10 of 10

#### 5 COMMENTS

1. Shwetha s

Thanks for providing valuable info

2. Ankush Sinha

10

3. vivek

9

4. Suresh Bala

Question 1
Current Ages Ratio 9: 4
After 5 Years Ratio 10:5 ( this is as good as 2:1)
Now both the ages are increased by 5 years and from my ratios I can see it as 1.
So 1 part corresponds to 5 and at this rate the current age of the father which is 9 parts will be 45.

Question 2
Assume CP is 100.
=> SP is 115 (Since sold at 15% profit)
Now, if the same article is bought for 15% less, CP = 85 & SP = 102 (Since a gain of 20% is made)
Now for a CP of 100, the SPs differ by 115 – 102 = 13.
Since, in the question the SPs differed by 78, the CP must be (78/13) x 100 = 600

Question 3
In 1 hr, that part of the tank that will be filled is (1/2 – 1/3) = 1/6. Hence, the entire tank will be filled in 6 hrs

Question 4
Total Outcomes : 6^3, Fav Outcomes: 6. Hence, probability = 6/6^3 = 1/36

Question 5
SI @ 7% for 2 years = 14%
CI @ 7% for 2 years = 14.49%
Difference is 0.49% and is given as 7.35
Principal amount which is always 100% is (100/0.49) x 7.35 = 1500

Question 6
18 Children take 12 days => Work requires 18 x 12 Child Days.
Now the same number of Child Days can be contributed by 8 Children in (18 x 12)/8 = 27 days

Question 7
Each Student got 20%(65) = 13 Sweets
Each Teacher got 40%(65) = 26 Sweets
Total Sweets Required = 65 x 13 + 4 x 26 = 949
(Notice that you can choose your answer by calculating only the unit’s digit, of course, options are allowing that here)

Question 8
125% is given as Rs.20 and the question is asking for 15% (increase only)
Hence (15/125) x 20 = 2.4

Question 9
Downstream Speed = 13 & Upstream Speed = 7
Speeds Ratio is 13:7
=> Times Ratio is 7:13
From the ratio, the times differ by 6 parts and this is given as 12 hrs.
So time taken to go Downstream which is 7 parts will be 14 hrs.
Finally Distance = Downstream Speed x Time = 13 x 14 = 182 (Again you can use the unit’s digit shortcut to choose answer)

Question 10
Total Cards = 52
Queen Club = 1 & King Heart = 1 => Fav Cards = 2
Probability = 2/52 = 1/26

5. GauriJai

score – 7

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