How many numbers can you make from 650271 without repeating a digit?
1,956 different numbers can be made from 6 digits. You can
calculate this by using the permutation function in a summation
function, like this:
Σ6k=1 6Pk = 6P1+6P2+...+6P5+6P6
What this does is calculate how many 1 digit numbers you can
make from 6 digits, then how many 2 digit numbers can be made from
6 digits and adds the amounts together, then calculates how many 3
digit numbers can be made and adds that on as well etc.