Roberto and Valerie are jumping rope at recess. Roberto can skip 4,200 times an hour. Valerie can skip 80 times a minute. If they jump rope for fifteen minutes straight, how many skips will they total? Give the rationale and then the answer.
Let's think step by step. Roberto skips 70 times per minute because 4,200 / 60 = 70. Together they skip 150 times a minute. They will skip 2,250 times because 150 x 15 = 2,250.. The answer is: 2250.

Happy Cattle Ranch is home to 200 cows. Every year, the mother cows have enough calves that the number of cows the rancher owns rises by half the number of cows living on the ranch. If the rancher does not buy or sell any cows, how many cows will the rancher own on Happy Cattle Ranch in two years? Give the rationale and then the answer.
Let's think step by step. In one year, the rancher will have 200 + 200 / 2 = 200 + 100 = 300 cows. In two years, the rancher will have 300 + 300 / 2 = 300 + 150 = 450 cows.. The answer is: 450.

There are 920 deer in a park. 10% of the deer have 8 antlers, and a quarter of that number also have albino fur. How many albino 8-antlered deer are there? Give the rationale and then the answer.
Let's think step by step. First find how many deer have 8 antlers: 920 deer * 10% = 92 deer. Then divide that number by 4 to find how many deer meet both criteria: 92 deer / 4 = 23 deer.. The answer is: 23.