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: The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Re. 1. The sum (in Rs.) is?

Option A: 625

Option B: 827

Option C: 657

Option D: 726

Option E: 634

Answer: Option A

Question: Question: In a queue that comprises of 7 students. Sam and Tom are in the queue, what is the probability that they will be standing next to each other in the queue?

Option A: 7%

Option B: 14%

Option C: 21%

Option D: 28%

Option E: 35%

Answer: Option C

Question: Question: Two tests had the same maximum mark. The pass percentages in the first and the second test were 40% and 45% respectively. A candidate scored 216 marks in the second test and failed by 36 marks in that test. Find the pass mark in the first test?

Option A: 277

Option B: 266

Option C: 111

Option D: 121

Option E: 224

Answer:
Option E