1) Bill’s investment has been doing well. His investment has doubled in value every year in the last 5 years. If his investment is worth $1600 right now, how much money was his investment worth 2 years ago?

Answer: $    

2) Solve the number riddle: If you multiply me by 7 then subtract 7 from the product, you will have 70. What number am I?

Answer:

3)  Girls are occupying exactly ²/₅ of the seats in a cafeteria and boys are occupying exactly ³/₇ of the seats in the same cafeteria. What is the minimum number of seats in the cafeteria?

Answer: seats  

4) When selecting 2 different numbers from the set {5, 7, 11, 13, 17}, how many different products are possible?

Answer: different products  

5) Anthony, William, Christopher and Matthew are sharing 4 hats: red, green, blue and gold. If Anthony doesn’t wear red, William doesn’t wear green, Christopher doesn’t wear blue and Matthew doesn’t wear gold, how many different ways can they share the four hats?

Answer:  different ways