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: If the number 5 * 2 is divisible by 6, then * = ?

 Option A: 2

 Option B: 5

 Option C: 3

 Option D: 1

 Option E: 6
Option A

Question: How many odd 4-digit positive integers R that are multiples of 5 can be formed without using the digit 3?

 Option A: 648

 Option B: 729

 Option C: 900

 Option D: 1296

 Option E: 3240
Option A

Question: A man’s current age is (2/5) of the age of his father. After 8 years, he will be (1/2) of the age of his father. What is the age of father at now?

 Option A: 40

 Option B: 45

 Option C: 38

 Option D: 50

 Option E: 39

Option A