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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! 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 652, compute 6 * 7 = 42, then write "4225" as the answer. Example: To find 252, compute 2 * 3 = 6, then write "625" as the answer. Note: This only works if the second digit is 5!
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 652, compute 6 * 7 = 42, then write "4225" as the answer.
Example: To find 252, compute 2 * 3 = 6, then write "625" as the answer.
Note: This only works if the second digit is 5!
yes this trick is useful
thanks
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