Rylee is bored and decides to count the number of leaves falling off the tree in her backyard. 7 leaves fall in the first hour. For the second and third hour, the leaves fall at a rate of 4 per hour. What is the average number of leaves which fell per hour?
Let's think: 7 leaves fell in the first hour. 4 leaves fell in the second hour. 4 leaves fell in the third hour. The total number of leaves that fell during the 3 hours is 7 + 4 + 4 = 15 leaves. The average number of leaves that fell per hour is 15 leaves / 3 hours = 5 leaves per hour.. The answer is: 5.

Hannah comes home from work to find her older son taped her younger son to a chair with 22 strands of duct tape. If Hannah can cut 8 strands per minute and her son can cut 3 strands per minute, how long will it take them to free her younger son?
Let's think: First find the total number of strands the two of them can cut per minute: 8 strands + 3 strands = 11 strands. Then divide the total number of strands by the number of strands they cut per minute to find the number of minutes it takes to cut all the strands: 22 strands / 11 strands / minute = 2 minutes.. The answer is: 2.

40 kids are running a race. 10% of them pass the finish line in less than 6 minutes. Three times that number finish in less than 8 minutes. 1/6 of the remaining kids take more than 14 minutes. How many kids take more than 14 minutes?
Let's think: First find how many kids finish in under 6 minutes: 40 kids * 10% = 4 kids. Then triple that number to find how many finish in less than 8 minutes: 4 kids * 3 = 12 kids. Then subtract those two numbers from the total number of kids to find the number of remaining kids: 40 kids - 4 kids - 12 kids = 24 kids. Then divide that number by 6 to find how many kids take more than 14 minutes: 24 kids / 6 = 4 kids.. The answer is: 4.

Ian spent half the money he made on doing online surveys. If he worked 8 hours doing surveys and on average he's able to earn $18 per hour doing surveys, how much money does he have left?
Let's think:
Ian is able to earn $18 per hour doing surveys. If he worked 8 hours doing surveys, then he earned $18 * 8 = $144. If he spent half of what he earned, then he spent $144 * 50% = $72. If Ian spent $72 of his earnings, then he has $144 - $72 = $72 left.. The answer is: 72.