a2zinterviews

19.	A person was asked to state his age in years. His reply was, “Take my age three years hence, multiply it by 3 and then subtract three times my age three years ago and you will know how old I am.” What was the age of the person?
	A.  14 years
	B.  18 years
	C.  20 years
	D.  32 years

Solution

Let the present ages of the person be x years. Then 3(x-3)-3(x-3) ‹=› x= (3x+9)-(3x-9) x=18.

20.	Q is as much younger than R as he is older than T. If the sum of the ages of R and T is 50 years, what is definitely the difference between R and Q's age ?
	A.  1 year
	B.  2 year
	C.  25 year
	D.  Data inadequate

Solution

R - Q = R - T Q = T. Also, R + T = 50 ‹=› R + Q = 50. So, (R - Q) cannot be determined.

21.	The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child ?
	A.  4 years
	B.  8 years
	C.  10 years
	D.  12 years

Solution

Let the ages of the children be x,(x+3),(x+6),(x+9) and (x+12) years. Then, x+(x+3)+(x+6)+(x+9)+(x+12)=50 5x=20 x=4. Age of the youngest child =4 years.