James earns $10 per week as an allowance. After saving all his money for four weeks, he spends half of it on a new video game. He then spends a quarter of what is left to buy a new book. How much money does he have left?
Let's think: He starts out with $10 * 4 = $40. James spend $40 / 2 = $20 on the video game. After buying the game, he has $40 - $20 = $20 left. He spent $20 / 4 = $5 on the book. He has $20 - $5 = $15 left.. The answer is: 15.

A clerk can process 25 forms per hour. If 2400 forms must be processed in an 8-hour day, how many clerks must you hire for that day?
Let's think: One clerk can process 25 x 8 = 200 forms in a day. To process the forms for that day 2400 / 200 = 12 clerks must be hired.. The answer is: 12.

The central Texas countryside contains many toads that come out at night. For every green toad, there are 25 brown toads, and one-quarter of the brown toads are spotted. If there are 50 spotted brown toads per acre, how many green toads are there per acre?
Let's think: If there are 50 spotted brown toads per acre, and this represents one - quarter of the brown toads, then there are 50 * 4 = 200 brown toads per acre. If for every 25 brown toads there is one green toad, then there are 200 / 25 = 8 green toads per acre.. The answer is: 8.

In his garden, Grandpa had counted 36 small tomatoes before going on vacation. When he came back from vacation, he counted 100 times more tomatoes. How many tomatoes grew in his absence?
Let's think:
Before going on vacation, Grandpa counts 36 tomatoes. After going on vacation, Grandpa has 100 * 36 = 3600 tomatoes. So in his absence, 3600 - 36 = 3564 tomatoes have grown.. The answer is: 3564.