Squaring Numbers Ending in 5

The following is a quick trick for squaring any number ending in 5.

Look at the math problem 65² = ? Let's see how the trick works.

• Take the first number (6) and multiply by the next number 6 x 7 = 42. Then just add 25 on the end.

ANSWER is 4225

It's as simple as that.

Watch the math video below for a detailed explanation!

Practice Math Problems

1. What is 45² equal to?
2. What is 65² equal to?
3. What is 85² equal to?
4. What is 15² equal to?
5. What is 25² equal to?
6. What is 35² equal to?
7. What is 105² equal to?
8. What is 75² equal to?
9. What is 95² equal to?
10. What is 305² equal to?