763199 + 3672 = 766871
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0.0025
3672.
By squaring the first ten numbers. 02 = 012 = 122 = 432 = 942 = 1652 = 2562 = 3672 = 4982 = 6492 = 81
12 = 122 = 432 = 942 = 1652 = 2562 = 3672 = 4982 = 6492 = 81102 = 100112 = 121122 = 144132 = 169142 = 196152= 225So the first 15 perfect squares are 1,4,9,16,25,36,49,64,81,100,121,144,169, and 225
You should use your calculator for such simple sums. It is far quicker and involves fewer key depressions than posting the question on WA. But since you seem unable to carry out even this simple exercise, the answer is 3672.