Q: In preparation for his mountain climbing, Arvin wants to run a total of 20 kilometers in a week. On the first day, he ran 2 kilometers. On each subsequent day, he increased his running distance by 1 kilometer over the previous day. If he runs for 5 days a week, how many kilometers did he run on the 5th day?
A: On the second day, Arvin ran 2 + 1 = 3 kilometers. On the third day, he ran 3 + 1 = 4 kilometers. On the fourth day, he ran 4 + 1 = 5 kilometers. So on the fifth day, he ran 5 + 1 = 6 kilometers. The answer is 6.

Q: We the People has 17 cows. Happy Good Healthy Family has two more than three times the number of cows We the People has. If their cows are taken to a ranch to graze together, how many cows will be in the ranch altogether?
A: Three times the number of cows We the People has is 3 * 17 = 51 cows. Happy Good Healthy Family has two more than three times the number of cows We the People has, a total of 51 + 2 = 53 cows. If the cows are taken to a ranch to graze together, their total will be 53 + 17 = 70 cows. The answer is 70.

Q: Tom goes to a combined undergrad and Ph.D. program. It takes 3 years to finish the BS and 5 years to finish the Ph.D. Tom finishes it in 3/4ths the time. How long does it take for him to finish?
A:
The program normally takes 3 + 5 = 8 years. So he manages to finish in 8 * 3 / 4 = 6 years. The answer is 6.