Please help me solve the following sums.
1. The prime factorisation of two numbers are 2, 3 to the power of 2, 7 to the power of 3 and 13 and 3, 7 to the power of 2, 13 to the power of 3 and 17. Write down, in ascending order, all the common factors which are less than 100.
2. Find all the possible values of the digits x and y if the six digit number 123x4y is divisible by 36.
I need to hand this worksheet up by Friday.