3
Q:

The average age of a group of 10 students is 15 years. When 5 more students join the group, the average age increase by 1 year. The average age of the new student is?  

Answer:



Q:

The total of the ages of Amit and Suvarna on 1 January 2015 is 61 years. Amit is three years younger than Suvarna. What was the age of Suvarna on 1 January 2010?

 

A) 27 years B) 24 years
C) 29 years D) 32 years
 
Answer & Explanation Answer: A) 27 years

Explanation:
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Q:

The ratio of the present ages of Asha and Lata is 5 : 6. If the difference between their ages is 6 years, then what will be Lata's age will be after 5 years?

 

A) 35 B) 41
C) 45 D) 50
 
Answer & Explanation Answer: B) 41

Explanation:

The ratio of the present ages of Asha and Lata is 5 : 6.
Let the age of Asha and Lata be 5x and 6x respectively.
The difference between their ages = 6 years
6x - 5x = 6
x = 6
Age of Lata after 5 years = 6x + 5 = 6 6 + 5 = 41 years
The correct answer is option B.

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0 199
Q:

Two years ago, Aadya was three tmes as old as his son and two years hence, twice her age will be equal to five times that of her son. Find the Aadya's present age?

A) 38 yrs B) 36 yrs
C) 34 yrs D) 42 yrs
 
Answer & Explanation Answer: A) 38 yrs

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3 505
Q:

The ratio of the ages of the father and the son ten years from the present was 11:3. Ten year hence the ratio would be 21:13. What are the present ages of the father and the son?

 

A) 32, 16 B) 22, 14
C) 25, 15 D) 32, 12
 
Answer & Explanation Answer: A) 32, 16

Explanation:
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1 280
Q:

The average age of the number of persons in a group was calculated as 35 years, which was 2.5 years more than the correct average as there was an error in recording the age of two persons as 38.5 years and 40 years instead of 29 years and 22 years respectively. The number of persons in the group was:

 

A) 11 B) 12
C) 15 D) 13
 
Answer & Explanation Answer: A) 11

Explanation:
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3 511
Q:

The sum of the present ages of two persons is seven times that of the difference between their ages. After 5 years, the sum of their ages will become nine times that of the difference. What is the present age of the elder person?

 

A) 24 years B) 28 years
C) 14 years D) 20 years
 
Answer & Explanation Answer: D) 20 years

Explanation:
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1 601
Q:

The ratio of the ages of A and B, 8 years ago, was 2 : 3. Four years ago, the ratio of their ages was 5 : 7. What will be the ratio of their ages 8 years from now?

 

A) 4 : 5 B) 5 : 6
C) 7 : 8 D) 3 : 4
 
Answer & Explanation Answer: A) 4 : 5

Explanation:
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2 589
Q:

A group of three friends, K, L and M, are sitting in a cafe. Their average age is 24 years. Another friend ‘N’ joins the group and the new average age of the group becomes 23 years. If another friend ‘R’, whose age is 2 years more than that of ‘N’, replaces ‘K’, then the average age of L. M, N and R becomes 22.5 years. What is the age of K?

 

A) 15 years B) 10 years
C) 12 years D) 14 years
 
Answer & Explanation Answer: D) 14 years

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