Counting integers in practice problem - mistake?

GRE Quant Problem Solving
1

The solution video (screenshot attached) claims there are 10 multiples of 10 in the first 100 positive integers.

However, aren’t there are only 9?

My guess is that 0 is mistakenly being counted as positive. But even if it were not a mistake to count 0 as positive, shouldn’t it be excluded since 0 is divisible by any integer (i.e., 2, 3, and 5)?

Is this a mistake by GregMat or have I overlooked something?

Thank you!

0

2

10,20,30,40,50,60,70,80,90,100 → Clearly there are 10 multiples of 10 in the range (0,100]

3

That was dumb on my part. Thanks!