A LITTLE SOMETHING WORTH KNOWING
A small discovery. Yours to pass on.
Math & LogicOne small ahaProduct4 × 15
Think it. Then flip it.✳ ahamoraTap to reveal ↻Back to the cue ↶
Math & LogicOne small aha
Your new aha60
✳ ahamoraReference ↗4 groups of 15 make 60. Reversing the factors, 15 × 4, gives the same product. Source: Multiplication table ↗