Question

how many even integers are there between 1 and 199????

Answer 1

Simpler question:
How many even integers are there between 1 and 200?
First number in this series (1) is odd, and the last number (200) is even.
So we can just divide by 2 to get the answer since 1/2 are odd and half are even
100
For the evens between 1 and 199, we need to subtract off the 200
100 - 1
Answer 99.
(not 98 @HanshenJordan )

Answer 2

ah ok 99 :D my bad