Waldo ate a total of 100 peanuts in 5 days. Each day, he ate 6 more peanuts than he did the day before. So, how many peanuts did Waldo start with on the first day?

Answer
Waldo ate 8 peanuts on day 1. He had 14 peanuts on day 2 and added 6 peanuts each day up to day 5. By day 5, Waldo would have eaten a total of a 100 peanuts.