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Q.

The sum of the ages of 5 children born at intervals of 3 years each is 50 years. What is the age of the youngest child?


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a

    4 years

b

    8 years

c

    10 years

d

    6 years 

answer is A.

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Detailed Solution

It is given the sum of the ages of 5 children born at intervals of 3 years each is 50 years.
Let the age of the youngest child be x years.
According to question,
 x+(x+3)+(x+6)+(x+9)+(x+12)=50  ⇒5x+30=50
⇒5x=20
⇒x=4  Therefore, age of the youngest child is 4 years.
Hence, the correct option is 1.
 
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The sum of the ages of 5 children born at intervals of 3 years each is 50 years. What is the age of the youngest child?