Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
A mother is serving pizza at her son's birthday party.  After buying 5 pizzas, she must decide how many slices to divide each pizza into so that everyone at the party ends up with an equal number of slices.  There are a total of 20 children at the party, and she can choose to divide each pizza into either 6, 8, or 10 slices.  Assuming she does not want to throw away any pizza, how should many slices should she choose to divide the pizzas into to make sure everyone receives an equal amount?

### Response:
Checking each possibility, we can see that dividing each pizza into 6 slices yields 5*6 = 30 total slices, dividing each pizza into 8 slices yields 5*8 = 40 total slices, and dividing each pizza into 10 slices yields 5*10 = 50 total slices.
Because each child must receive the same number of slices, the total number of slices must be evenly divisible by 20.
Dividing 30 slices by 20 children yields 1.5 slices per child, dividing 40 slices by 20 children yields 2 slices per child, and dividing 50 slices by 20 children yields 2.5 slices per child.
Because 2 slices per child is the closest option to 2.5 slices per child, the mother should divide each pizza into 8 slices.
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