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Ages - Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to Ages. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Q 1 - The average age of five officers in a department is 32 years. If the age of their supervisor is added the average increases by 1. What is the supervisor's age?

Answer : C

Explanation

Supervisor?s age = 32 + 6 = 38 years

Q 2 - The average age of 30 boys in a class is 15 years. One boy aged 20 years, left the class, but two new boys came in his place whose ages differ by 5 years. If the average age of all the boys now in the class still remains 15 years, the age of the younger newcomer is :

Answer : B

Explanation

Let the age of younger boy be x years.
Therefore age of older boy = (x+5) years
Then, total age of 30 boys = 30*15 = 450 years
Total age of 31 boys after two newcomers join = 450 - 20 +x + x +5
= 435 + 2x

From the question, 435 + 2x = 31 * 15
Or, 2x = 465 - 435
Or, x = 15 years

Q 3 - The ratio of the present ages of a son and his father is 1:5 and that of his mother and father is 4: 5. After 2 years the ratio of the ages of the son to that of his mother becomes 3 : 10. What is the present age of the father?

Answer : D

Explanation

Let the present age of the son be x years.
 present age of the father = 5x years and that of the mother = 4x years.

2 years hence, age of son = (x + 2) years
And age of the will be = (4x + 2) years

As per the question,
(x + 2)/(4x + 2) = 3/10
Or, 10 (x+2) = 3 (4x + 2)
Or, 10x + 20 = 12x + 6
Or, 2x = 14
Or, x = 7
Present age of father = 5x = 5*7 = 35 years

Q 4 - Prabhakar is 15 years older than Navin and Navin is 25 years younger than Ashok. Which of the following represents the difference between the ages of Ashok and Prabhakar?

Answer : D

Explanation

According to question,
P = N + 15
A = N + 25

A - P = (N + 25) - (N + 15) = 10 years

Q 5 - If 1:2 is the present age ratio of two girls. But 1:3 age ratio of girls was 5 year ago . In that case find out the ratio of age after the period of 5 year?

Answer : C

Explanation

If the present age of two girls is x and 2x years. Then,
x-5/ 2x-5 = 1/3 ⇒ 3(x-5) =(2x-5) ⇒ x =10
5 year after their age ratio will be = x+5/ 2x+5 = 10+5/20+5 = 15/25 = 3/5= 3:5

Q 6 - If 6 year is the difference of age of two boys ram and shyam at the present time. After the period of 4 year, the ratio of their age would be 3:4 . find out the shyam age at the present time?

Answer : C

Explanation

Let  x year is the ram present age then shyam present age will be (x+6)
X+4/ (x+6+4) = 3/4 = x+4/ x+10 = 3/4  ⇒ 4(x+4) = 3(x+10) ⇒ x = 14.
Hence , it proves that the present age of shyam = (14+6) = 20 year

Q 7 - If Ram and Sham have 36 year and 16 year age . After how much time ram age would be double as old as sham ?

Answer : D

Explanation

Let it be in x years. Then,
36+x = 2(16+x) ⇒ x =4

Q 8 - If 45 year is the sum of mother and her son age. 5 year agoThe product of mother and son ages was 4 times in the comparison of mother present age. Find out the present age of mother and her son?

Answer : B

Explanation

Let mother present age be x yrs and son  age be  (45-x) yrs.
(x-5) (45-x-5) = 4(x-5) ⇒( x-5) ( 40-x) = 4( x-5) ⇒ 40-x =4 ⇒ x =36
Present age of mother is 36 yrs. And age of son is 9 yrs.

Q 9 - Before the period of 16 year, my grandfather was 8 times older in the comparison of me. He would be 3 times of my age 8 years now. Find out the ratio of my grandfather and my age before the period of 8 year.

Answer : D

Explanation

Let my age 16 yrs ago be x years.
My grandfather age at that time = 8x years
My present  age = (x+16) yrs.
My grandfather present age = (8x+16) years.
3(x+16+8)= (8x+16+8) ⇒ 3x+72 = 8x+24  ⇒ 5x = 48 ⇒ x = 48/5
Ratio of our  ages  8 yrs ago =  (x+16-8) /(8x+16-8) = x+8/ 8x+8
 (48/5+8)/ (8* 48/5 +5) = 88/424 = 11 :53.

Q 10 - Here 3:2 is the present age ratio between raj and john. If raj was 6 year older in the comparisoin of john after the priod of 4 years. What should be the present age ratio of john?

Answer : B

Explanation

Let raj age = 3x years. Then john age = 2x years.
(3x-4) = 2x-4 +6 ⇒ x =6
Present age of john = (2*6) = 12 years

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