If Sarah is twice as old as Tom and the sum of their ages is 36, what is Tom's age?
Category: Math · Difficulty: hard
Hint: Set up a simple algebraic equation.
Answer
12
Explanation
Let Tom's age be x, then Sarah's age is 2x. The equation x + 2x = 36 yields x = 12.
This is a hard math riddle — a tricky one that takes a little thought. The answer is 12.
More Math riddles
- What is 1/2 of 3/4?
- I am a number that is one less than a dozen. What number am I?
- If the product of two numbers is 72 and their difference is 6, what are the numbers?
- In a set of numbers, 2, 3, 5, 7, 11, and 14, which number is the odd one out based on primality?
- Find a number that is both triangular and a perfect square, and is greater than 1.
- What is the smallest odd prime factor of 91?
- What is the value of 4! (four factorial)?
- I am a pair of prime numbers that differ by only two. The sum of my digits is 10. What are my numbers?