There are 7 cars in a amusement park ride. there are 42 people divided equally among the 7 cars. how many people ride in 1 car?

Prove that 16^4-2^13-4^5 is divisible by 11.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Jonathan can throw a baseball 10 1/3 yards. his brother joey can throw a baseball 13 1/2 yards. how much father can joey throw the ball?