Question

Com os algarismos 1,2,3,4,5,6 e7,quantos números de 2 algarismos distintos podemos formar?

Answer 1

12, 13, 14, 15, 16, 17, 21, 23, 24, 25, 26, 31, 32, 34, 35, 36, 41, 42, 43, 45, 46, 51, 52, 53, 54 , 56, 61, 62, 63, 64, 65.

32 números