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The fast way of squaring a number that ends in 5 using vedic maths, that will make you the envy of all your freinds...OK maybe not.... The trick is this to faster squaring.... Say we have 65 squared. Get the number that is not 5 ( that is 6) and multiply it by the next number after it (7). Then just write 25 on the end. So 6 x 7 = 42, our answer is 4225. Really. Simple 'eh?