Multiple choice

Kirti got married 6 years ago. Today her age is $1\dfrac {1}{4}$ times her age at the time of marriage. Her son's age is (1/10) times her age. Her son's age is _______.

  1. $2$ years
  2. $3$ years
  3. $4$ years
  4. $5$ years
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let K be Kirti's age at marriage. Today, her age is K + 6. Given K + 6 = (5/4)K, we find (1/4)K = 6, so K = 24. Her current age is 24 + 6 = 30. Her son's age is (1/10) * 30 = 3 years.

AI explanation

Let Kirti's age at the time of marriage be x years; her present age is x + 6. We are given that x + 6 equals 1.25 times x, so 0.25x equals 6, making x equal to 24. Kirti's present age is therefore 24 plus 6, which is 30 years. Her son's age is 1/10 of 30, which equals 3 years.

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