**= 479001600**. We hope it will be very helpful for you and it will help you to understand the solving process. For example and are factors of 100.

479001600 has two consecutive zeroes at the end. In 1787 Joseph Bramahs lock patent was granted with 479001600 keys required to open it under all its variations. So 479001600 combinations are possible if repetition is not allowed.

### 14 x 13 x 12 x 11x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 18 x 7 x 6 x 5 x 4 x 3 x 2 x 1 12 x 11x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 16 x 5 x 4 x 3 x 2 x 1 As you can see the common factors in numerator and denominator gets cancelled on both LHS and RHS 14 x 13 8 x 7 182 x 56.

The product of its nonzero digits is 1512 while the sum is 27. Counting Bijective Injective and Surjective Functions posted by Jason Polak on Wednesday March 1 2017 with 11 comments and filed under combinatorics. May 6 2020 953pm 1. For example and are factors of 100.