Question

Alguém pra responder...

Com os algarismos 1 2 3 7 8 e 9.Quantos numeros podemos forma ?

a) Com 2 algarismos ?
b) Com 2 algarismos destintos ?
c) Pares com 2 algarismos ?

Answer 1

a) 11,12,13,17,18,19,21,22,23,27,28,29,31,32,33,37,38,39,71,72,73,77,78,79,81,82,83,87,88,89,91,92,93,97,98,99

b) 12,13,17,18,19,21,23,27,28,29,31,32,37,38,39,71,72,73,78,79,81,82,83,87,89,91,92,93,97,98

c) 12,18,22,28,32,38,72,78,82,88,92,98