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

Options
1) 6 years
2) 5 years
3) 4 years
4) 3 years

• The five children's ages will be :-
  x, x + 3, x + 6, x + 9, x + 12.
  Added together this gives:
  5x + 30
  Total of ages = 50
  
  5x + 30 = 50
  5x = 50 - 30
  5x = 20
  x = 4.
  The youngest child is 4 years old.
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