Amazing Math Trick # 1 | Sir Khalid Mehmood

You can square numbers ending in 5 the same way you square other numbers. A quick way to square any number is by using a calculator; however, when you are squaring a two-digit number ending in 5, you can use an easy method without the aid of a calculator. For a two-digit number with the digit x in the tens place, simply calculate x(x+1), then append 25 to the end of this product.
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