Squares ending in 5 - Two Digit Numbers

You can use this shortcut when multiplying a two digit number by itself that ends with a five.

Example: 75 * 75 (this can be shown as 75² and pronounced 75 squared)

Step 1) The last two digits of the answer will be 25 since the number we are squaring ends in a 5
_ _ 2 5

Step 2) To get the first two digits of the answer we need to do first have to to add one to the the non-five digit (7).
7 + 1 = 8

Step 3) Next, multiply the non-five digit by the result from Step 2.
7 * 8 = 56

Step 4) The first two digits in the answer is the product from Step 3. Our final answer is:
5 6 2 5