TASK DEFINITION: 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.
PROBLEM: Question: If seven machines working at the same rate can do 3/4 of a job in 30 minutes, how many minutes would it take two machines working at the same rate to do 3/5 of the job?

Option A: 45

Option B: 60

Option C: 75

Option D: 84

Option E: 100

SOLUTION: Option D

PROBLEM: Question: In an electric circuit, two resistors with resistances x and y are connected in parallel. If R is the combined resistance of these two resistors, then the reciprocal of R is equal to the sum of the reciprocals of x and y. What is R if x is 5 Ohms and y is 7 Ohms?

Option A: 3/5

Option B: 1/7

Option C: 12/35

Option D: 31/12

Option E: 35/12

SOLUTION: Option E

PROBLEM: Question: If m is the product of all integers from 1 to 40, inclusive, what is the greatest integer p for which 10^p is a factor of m?

Option A: 7

Option B: 8

Option C: 9

Option D: 10

Option E: 11

SOLUTION:
Option C