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Numbers Riddles - Riddles.com

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  1. How many times can you subtract the number 5 from 25?
  2. What number can you subtract half from to obtain a result of zero?
  3. What two whole, positive numbers have a one-digit answer when multiplied and a two-digit answer when added?
  4. What two whole, positive numbers have the same answer when multiplied together as when one is divided by the other?
  5. What two whole, postive numbers have the same answer when multiplied together as when added together?
  6. What two-digit number equals two times the result of multiplying its digits?
  7. What three whole, positive numbers have the same answer when multiplied together as when added together?
  8. What two-digit numbers are each equal to their right-most digit squared?
  9. What is the highest number that can be written with three digits?

Answers: Numbers Riddles Quiz

  1. Once, because after you subtract 5 from 25 it becomes 20.
  2. The number 8.  It's made up of two zeros, one on top of the other.
  3. 1 and 9.
  4. Any number and 1.
  5. 2 and 2.
  6. 36 = 2 x 3 x 6.
  7. 1, 2 and 3.  1 x 2 x 3 = 1 + 2 + 3 = 6.
  8. 25 = 5² and 36 = 6².
  9. (9⁹)⁹ = 9³⁸⁷⁴²⁰⁴⁸⁹, which is a number with more than 369 million digits.
  1. Once, because after you subtract 5 from 25 it becomes 20.
  2. The number 8.  It's made up of two zeros, one on top of the other.
  3. 1 and 9.
  4. Any number and 1.
  5. 2 and 2.
  6. 36 = 2 x 3 x 6.
  7. 1, 2 and 3.  1 x 2 x 3 = 1 + 2 + 3 = 6.
  8. 25 = 5² and 36 = 6².
  9. (9⁹)⁹ = 9³⁸⁷⁴²⁰⁴⁸⁹, which is a number with more than 369 million digits.