book Maths Puzzle Numerical Ability

perform the division

2mto the 3rd+6m to the 2nd - 2m+24 divided by 2m to th 2nd-2m+6

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book Other Question

List all pairs of factors of each integer.
1) 18
2) 30
3) 17
4) -8 i have a problem... 2/7=x/-42
I know you cross multiply
7x=-84
x=-84-7
x=-91
Im i right?