Chat with our AI personalities
1. 1 goes into itslef once (1x1=1.) 1 goes into 20, 20 times(1x20=20.)
Exactly 27 times
1, 3, 9, 27.
It is only 1
27 * 19 = 27*(20 - 1) = 27*20 - 27*1 = 27*2*10 - 27 = 54*10 - 27 = 540 - 27 = 540 - 30 + 3 = 510 + 3 = 513