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Home » The sum of present ages of a man and his son is 45 years. Five years ago, the man was 4 times as old as his son. Find the son’s present age.

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The sum of present ages of a man and his son is 45 years. Five years ago, the man was 4 times as old as his son. Find the son’s present age.

A. 10 years
B. 12 years ✅
C. 14 years
D. 15 years

Explanation

  • Man + Son = 45
  • (Man - 5) = 4(Son - 5)
  • Man = 4(Son) - 15
  • Substituting: 4Son - 15 + Son = 45
  • 5Son = 60
  • Son = 12 years