instruction:
You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
question:
Question: If k and w are the dimensions of a rectangle that has area 21, and if k and w are integers such that k > w, what is the total number of possible values of k?

Option A: Two

Option B: Three

Option C: Four

Option D: Five

Option E: Six
answer:
Option A

question:
Question: Car X began traveling at an average speed of 35 miles per hour. After 72 minutes, car Y began traveling at an average speed of 41 miles per hour. When both cars had traveled the same distance, both cars stopped. How many miles did car X travel from the time car Y began traveling until both cars stopped?

Option A: 140

Option B: 175

Option C: 210

Option D: 245

Option E: 280
answer:
Option D

question:
Question: By selling an article at Rs.600, a profit of 60% is made. Find its cost price?

Option A: 228

Option B: 267

Option C: 375

Option D: 480

Option E: 811
answer:
Option C