When can I use this method?
For squaring 2-digit numbers or 3-digit numbers ending with 5.
One can also use this method to solve higher digit numbers as long as multiplication of numbers is easy enough.
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- This method uses the concept (a + 5)2 = [a (a + 10)] + 25, where ‘(a + 5)’ is the number ending with 5 and ‘a’ is the tens place value of that number.
Related Shortcuts –