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: What does the hexa number E78 in radix 7.

 Option A: 12455

 Option B: 14153

 Option C: 14256

 Option D: 13541

 Option E: 14541

Answer: Option D


Question: Question: On his first 3 tests, Rajeev received an average score of X points. If on his fourth test, he exceeds his previous average score by 24 points, what is his average score for his first 4 tests?

 Option A: X

 Option B: X+6

 Option C: X+4

 Option D: X+3

 Option E: X+2

Answer: Option B


Question: Question: The length of a rectangle is four times its width. If the area is 100 m2 what is the length of the rectangle?

 Option A: 50 m

 Option B: 40 m

 Option C: 80 m

 Option D: 20 m

 Option E: 70 m

Answer:
Option D