Question

If x is a positive integer and 20x<100 then find solution set of x.

(a) {0,1,2,3,4,5}

(b) {1,2,3,4,5}

(c) {1,2,3,4}

(d) {0,1,2,3,4}

I had been asked this question during an online exam.

The question is from Algebraic Solutions of Linear Inequalities in One Variable and their Graphical Representation topic in portion Linear Inequalities of Mathematics – Class 11

Answer 1

Correct answer is (c) {1,2,3,4}

For explanation I would say: 20x<100

Dividing by 20 on both sides, x< (100/20) => x<5

Since x is a positive integer so x = 1,2,3,4.