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Question

A father said to his son, "I was as old as you are when I became your father." If the current age of father is 52 years, the age of son after 10 years will be___________.

The correct answer is
36 years

This problem involves calculating ages based on a specific relationship described by the father. The key is understanding that the age difference between the father and son remains constant.

Father Son Age Logic

Let $F$ represent the father's current age and $S$ represent the son's current age.

  • We are given the father's current age: $F = 52$ years.

Analyzing the Statement

The father's statement is: "I was as old as you are when I became your father."

  • "When I became your father" refers to the time when the son was born.
  • This was $S$ years ago (the son's current age).
  • Therefore, the father's age at that time was $F - S$.
  • The statement sets up the equation: Father's age then = Son's age now.
  • So, $F - S = S$.

Calculating Son's Current Age

Substitute the father's current age ($F = 52$) into the equation:

$ 52 - S = S $

To solve for $S$, add $S$ to both sides:

$ 52 = S + S $

$ 52 = 2S $

Divide by 2:

$ S = \frac{52}{2} $

$ S = 26 $

The son's current age is 26 years.

Finding Son's Future Age

The question asks for the son's age after 10 years.

Son's age after 10 years = Son's current age + 10 years

$ \text{Son's age after 10 years} = 26 + 10 $

$ \text{Son's age after 10 years} = 36 \text{ years} $

The son's age after 10 years will be 36 years.

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Important Questions from Problem on Ages (Notes)

  1. At present, Sharad is three times as old as his son, and his daughter is 3 years younger than the son. If the sum of the ages of these three people 3 years ago was 63 years, then Sharad's present age (in years) is:
  2. The sum of the age of A and 5 times the age of B is 55 years. When 3 times the age of A is added to 7 times the age of B, the result is 99 years. The sum of the ages (in years) of A and B is:
  3. The sum of the age of A and 3 times the age of B is 43 years. When 5 times the age of A is added to 2 times the age of B, the result is 98 years. The sum of the ages (in years) of A and B is:
  4. Eight years ago, the age of the mother was four times the age of her son. Eight years hence, the mother's age will be two times the age of her son. Find the ratio of the present age of the mother to the age of the son.
  5. The sum of the age of A and 5 times the age of B is 36 years. When 3 times the age of A is added to 7 times the age of B, the result is 62 years. The sum of the ages (in years) of A and B is:
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