Fact #3: The surface area of each face is (the length of the cube's side)²
Now that I look at this one more carefully, the only thing you need to know to solve it is Fact #3. (But you can keep the others and save them for later.)
The surface area of each face is (the length of the cube's side)²
64 is the (length of the cube's side)²
Can you find a number that gives you 64 when you multiply it by itself ? That's the length of the cube's side.
Hint: If you don't get ' 8 ', work on it a little more.
I will suppose that your queation is 10<x<y<14 there are only two odd between 10 and 14 which are 11 and 13 since x is smaller than y x=11 and y=13 there sum will be x+y=11+13=24