Question

Mr. cringle found a box of handmade holiday greeting cards in his garage and decided to make more to send to all his friends. After 2 hours had passed, Mr.Cringle had a total of 30 cards. After 6 hours had passed, he had a total of 40 cards. At what rate is Mr.Cringle making greeting cards and how many cards were in the box he found?

Answer 1

Well if he made 10 in 4 hours, that means he made 5 in 2 hours. after 2 hours he had 30 cards, so that means he started with 25 cards. Mr. Cringle is making 2 and 1/2 cards per hour.