### Expenses

What is the largest number which, when divided into 1905, 2587, 3951, 7020 and 8725 in turn, leaves the same remainder each time?

### Factorial

How many zeros are there at the end of the number which is the product of first hundred positive integers?

### Times Right

Using the digits 1, 2, 3, 4, 5, 6, 7 and 8, mulitply a two two digit numbers are multiplied to give a four digit number, so that the expression is correct. How many different solutions can you find?

# More Mods

##### Age 14 to 16Challenge Level

What is the units digit for the number 123$^{456}$?