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Grade: 11

                        

To find the square of a two-digit number ending in 5, take the first digit, multiply by itself plus one , and then put "25" after it. Example: To find 65 2 , compute 6 * 7 = 42, then write "4225" as the answer. Example: To find 25 2 , compute 2 * 3 = 6, then write "625" as the answer. Note: This only works if the second digit is 5!

6 years ago

Answers : (2)

Ankit Pathak
23 Points
							yes this trick is useful
						
6 years ago
Saurabh Mishra
48 Points
							thanks
						
6 years ago
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