3 ms·
I had read in Surely You are joking Mr Feynman, squaring numbers near 50 is really easy, for example, 49xx2 is (50 - 1)xx2 which is 2500 - 100 + 1 that is 2401.
by manish 17y ago
I had read in Surely You are joking Mr Feynman, squaring numbers near 50 is really easy, for example, 49xx2 is (50 - 1)xx2 which is 2500 - 100 + 1 that is 2401.