Multiple choice

Karthik is n years old today. 10 years ago his age was half of the present age.Find n

  1. 20

  2. 24

  3. 25

  4. 18
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let n be the current age. 10 years ago, his age was n - 10. The problem states n - 10 = n/2. Multiplying by 2 gives 2n - 20 = n, so n = 20.

AI explanation

Karthik's age 10 years ago was n - 10, which the problem states is half of his present age. The equation is n - 10 = n / 2, so multiplying by 2 gives 2n - 20 = n. Solving this results in n = 20.

Keep practicing — related questions