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: How much more would Rs.20000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?

 Option A: 482

 Option B: 297

 Option C: 278

 Option D: 298

 Option E: 279

Answer: Option A


Question: Question: The profits of QRS company rose 50% from March to April, then dropped 20% from April to May, then rose 50% from May to June. What was the percent increase for the whole quarter, from March to June?

 Option A: 15%

 Option B: 32%

 Option C: 40%

 Option D: 62%

 Option E: 80%

Answer: Option E


Question: Question: The average age of 36 students in a group is 14 years. When teacher’s age is included to it, the average increases by one. What is the teacher’s age in years?

 Option A: 31

 Option B: 36

 Option C: 51

 Option D: cannot be determined

 Option E: None of these

Answer:
Option C