Question Number 102086 by mathocean1 last updated on 06/Jul/20

Commented bymr W last updated on 06/Jul/20

what is a pair number?  =even number?  what is a pair digit? =even digit?  what is an unpair digit? =odd digit?

Commented bymathocean1 last updated on 06/Jul/20

Yes sir...

Answered by mr W last updated on 06/Jul/20

1)  3!+C_2 ^3 ×2×2×4+3×4×3=90  2)  3!+C_2 ^3 ×4×3!+3×C_2 ^4 ×3!=402  3)  4×3+C_2 ^4 ×3×3!+4×C_2 ^3 ×3!=138