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!