This sounds like an easy question but I just want to know if there's a quicker way to solve this:
The sum of 50 even number is 2,550. What is the sum of the even integers from 102-200 inclusive.
The series 102,104,...200 forms an AP.
sn = n/2(a+l) where n is the number of terms in the series, a is the first term, and l is the last term.
Number of terms = 50
a = 102
l = 200
sn = 50/2(102+200) = 7550