instruction:
Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
question:
Problem: a man swims downstream 36 km and upstream 18 km taking 3 hours each time, what is the speed of the man in still water ?
Options: a. 7, b. 8, c. 9, d. 2, e. 4
answer:
c


question:
Problem: a fraudulent dairy guy declares to market his dairy at price range but he combined it with water and therefore benefits 25 %. the percentage of water in the combination is :
Options: a. 20 %, b. 30 %, c. 50 %, d. 35 %, e. 60 %
answer:
a


question:
Problem: rice weighing 35 / 2 pounds was divided equally and placed in 4 containers. how many ounces of rice were in each container ? ( note that 1 pound = 16 ounces )
Options: a. 40, b. 50, c. 60, d. 70, e. 80
answer:

d