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: The population of a certain town increases by 50 percent every 50 years. If the population in 1950 was 810, in what year was the population 160?

 Option A: 1650

 Option B: 1700

 Option C: 1750

 Option D: 1800

 Option E: 1850
Option C

Question: I. a3 - 305 = 207,
II. b2 - 72 = -8 to solve both the equations to find the values of a and b?

 Option A: a > b

 Option B: a ≥ b

 Option C: a < b

 Option D: a ≤ b

 Option E: a = b or the relationship between a and b cannot be established.
Option B

Question: A solution of X pounds of water and sugar is boiled until 20% of the water content evaporates. Originally s% of sugar was present in the solution. After evaporation, what percentage of the solution is sugar?

 Option A: 100s/(1-s

 Option B: 80s/(1-s

 Option C: 75s/(1-s

 Option D: 100s/(80-0.2s

 Option E: 100s/(80+0.2s

Option E

