-900
25 prime numbers in that range.
The Least Common Multiple (LCM) of 10, 100, and 1,000 is 1,000.
There is only one prime number which is even - that is 2 - and it also happens to be less than 100. All other prime numbers are odd.
269
Oh, dude, you're hitting me with some math vibes here. So, like, the sum of all prime numbers less than 100 would be 1060. Yeah, that's right, 1060. So, like, if you were wondering how much prime numbers under 100 add up to, there you go.