Question

In how many ways u can form a 6 digit number from 1,2,3,4,5,6,7

Answer 1

$7*6 \times 5 \times 4 \times 3 \times 2 \times 1$
5040 is the answer to the question

Answer 2

its 7^6 with repetation of digits = 117649
and with out repetation of digits =7x6x5x4x3x2
= 5040
are the answers...