Answer this question:George was selling some of his old toys on the internet. He managed to sell 3 little cars and a set of Legos. In total, he earned $45. How much did the Legos set cost, if one little car was sold for $5?
George sold 3 cars, so he earned 3 cars * $5 / car = $15 from them. The lego set cost was then $45 - $15 = $30.
The answer is 30.

Answer this question:Seth bought some boxes of oranges. He gave a box to his mother. He then gave away half of the remaining boxes. If Seth has 4 boxes of oranges left, how many boxes did he buy in the first place?
After giving a box to his mom, Seth had 4 * 2 = 8 boxes left. Seth bought 8 + 1 = 9 boxes of oranges.
The answer is 9.

Answer this question:There are 30 fish in the tank. One third of them are blue, and half of the blue fish have spots. How many fish in the tank are blue, spotted fish?
There are 30 / 3 = 10 blue fish. There are 10 / 2 = 5 blue spotted fish.
The answer is 5.

Answer this question:Pam has 10 bags of apples. Each of her bags has as many apples as 3 of Gerald's bags. If Gerald's bags have 40 apples each, how many apples does Pam have?
Each of Pam's bags contain 40 * 3 = 120 apples. Pam has 120 * 10 = 1200 apples.
The answer is 1200.