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.

[Q]: Question: Find the sum lend at C.I. at 5 p.c per annum will amount to Rs.441 in 2 years?

 Option A: Rs.900

 Option B: Rs.800

 Option C: Rs.500

 Option D: Rs. 400

 Option E: Rs.200
[A]: Option D


[Q]: Question: What is the units digit of 18! + 5 ?

 Option A: 2

 Option B: 3

 Option C: 4

 Option D: 5

 Option E: 6
[A]: Option D


[Q]: Question: If n is a positive integer, which of the following expressions must be even?

 Option A: (n − 3

 Option B: (n − 8

 Option C: (n − 4

 Option D: (n − 5

 Option E: (n − 5
[A]:
Option B