Question

The number line for natural numbers is ____________

(a) the line that extends indefinitely on both sides

(b) the line that extends indefinitely to the right, but from 0

(c) the line that extends indefinitely only to the right side of 1

(d) the line that extends indefinitely on both sides, but you can see numbers only between –1, 0 and 0, 1 etc

This question was posed to me in an online quiz.

My question is taken from Representation of Numbers on Number Line in portion Rational Numbers of Mathematics – Class 8

Answer 1

Right choice is (c) the line that extends indefinitely only to the right side of 1

Explanation: The set of natural numbers is [1, 2, 3, 4, 5…..] i.e. natural numbers start from 1 and extends to infinity on the positive side. The option which states that ‘The line that extends indefinitely to the right, but from 0′ shows the number line for whole numbers.