3 ms·Or a better way for us programmers: 16 * 16 = 256 16 * 2 = 32 256+32 = 288by Cyph0n 11y agoOr a better way for us programmers: 16 * 16 = 256 16 * 2 = 32 256+32 = 288cozzyd 11y agoEven better: 16 * 18 = (17-1)*(17+1) = 17^2-1 = 289-1 = 288. Provided of course you know your squares.Cyph0n 11y agoAh that's a good one. I had powers of 2 in mind.