Question

Laverne starts counting out loud by 5's. She starts with 7. As Laverne counts, Shirley sums the numbers Laverne says. When the sum finally exceeds 5000, Shirley runs screaming from the room. What number did Laverne last say before Shirley flees?

Answer 1

5000-7 = 4993
4993 = 5*998 + 3
7+4990 = 4997
The next number would have been 5002

Or, using modulo 5 math,

7 = 2(mod 5)
5000 = 0(mod 5)
So, 5002 = 2 (mod 5)

Answer 2

Steve: your answer is wrong because it says she stops when the sum exceeds 5000, not a number in the sequence