Peter bought 9 packs of pencils. Each pack has 10 pencils in it. If he lost 18 pencils, how many pencils
does Peter have left?
OA. 72
OB. 171
OC. 37
OD. 108

For this case we have that if each package of pencils has 10 pencils we have:

Thus, we have a total of 90 pencils.

If Peter lost 18 pencils we have:

Thus, Peter has 72 pencils left.

After losing 18 pencils, Peter has 72 pencils left.

Option A

the answer is 25 because they're both the same