what is shorter way of solving the following questions?

Q:

A: The sum of integers from 29 through 89

B: The sum of integers from 32 through 90

(If the question doesn’t mention both of those numbers included or not, do we add them or ignore them?)

what is shorter way of solving the following questions?

Q:

A: The sum of integers from 29 through 89

B: The sum of integers from 32 through 90

(If the question doesn’t mention both of those numbers included or not, do we add them or ignore them?)

Lets re-write like this

A = 29+30+31+32+…+89 (+90 is not there)

B = (29+30+31 is not there) 32+…+89+90

B is missing 29+30+31 = +90

A is missing +90

Thus i think answer will be C? @khalilullahtaj

It is written sum of integers from 29 through 89, so we got to include both numbers. If it were between 29 and 89, then we need to exclude!

Thanks a lot for the shortcut.