Riddle:
How many times can you subtract the number 5 from 25?
Answer: Once, because after you subtract 5 from 25 it becomes 20.
Riddle:
What two whole, positive numbers have a one-digit answer when multiplied and a two-digit answer when added?
Answer: 1 and 9.
Riddle:
What two whole, postive numbers have the same answer when multiplied together as when added together?
Answer: 2 and 2.
Riddle:
What three whole, positive numbers have the same answer when multiplied together as when added together?
Answer: 1, 2 and 3. 1 x 2 x 3 = 1 + 2 + 3 = 6.
Riddle:
What two whole, positive numbers have the same answer when multiplied together as when one is divided by the other?
Answer: Any number and 1.
Riddle:
What two-digit number equals two times the result of multiplying its digits?
Answer: 36 = 2 x 3 x 6.
Riddle:
What two-digit numbers are each equal to their right-most digit squared?
Answer: 25 = 5² and 36 = 6².
Riddle:
What number can you subtract half from to obtain a result of zero?
Answer: The number 8. It's made up of two zeros, one on top of the other.
Riddle:
What is the highest number that can be written with three digits?
Answer: (9⁹)⁹ = 9³⁸⁷⁴²⁰⁴⁸⁹, which is a number with more than 369 million digits.
Numbers Riddles Answers:
- Once, because after you subtract 5 from 25 it becomes 20.
- 1 and 9.
- 2 and 2.
- 1, 2 and 3. 1 x 2 x 3 = 1 + 2 + 3 = 6.
- Any number and 1.
- 36 = 2 x 3 x 6.
- 25 = 5² and 36 = 6².
- The number 8. It's made up of two zeros, one on top of the other.
- (9⁹)⁹ = 9³⁸⁷⁴²⁰⁴⁸⁹, which is a number with more than 369 million digits.