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.
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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: The cost price of a radio is Rs.1500 and it was sold for Rs.1230, find the loss %?

 Option A: 18%

 Option B: 19%

 Option C: 28%

 Option D: 38%

 Option E: 16%

Answer: Option A


Question: Question: Two trains are moving in the same direction at 162 kmph and 18 kmph. The faster train crosses a man in the slower train in 33 seconds. Find the length of the faster train?

 Option A: 1300

 Option B: 1310

 Option C: 1320

 Option D: 1330

 Option E: 1340

Answer:
Option C