Exercise

Author:NCERT

NCERT Mathematics Solutions for Exercise

Simple step-by-step solutions to Exercise questions of Rational Numbers from Mathematics Textbook of Competency Based Questions for Class VIII. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Exercise with Hints & Solutions

EASY
8th CBSE
IMPORTANT

Robin writes the properties of rational numbers as–

Property 1: For any two rational number x and y, x+y=y+x

Property 2: For any two rational number x and y, x-y=y-x

Property 3: For any two rational number x and y, x/y=y/x

Property 4: For any two rational number x and y, x×y=y×x

Which properties written by Robin are incorrect? Why are they incorrect?

MEDIUM
8th CBSE
IMPORTANT

Is the statement ‘All integers are rational numbers, but all rational numbers are not integers’ correct? Give examples to support your answer.

HARD
8th CBSE
IMPORTANT

There is a two-digit odd number which is not a prime number. When the digits of the number are reversed and added to the number itself, the resultant is a perfect square. What is the number?

MEDIUM
8th CBSE
IMPORTANT

An integer is added to its multiplicative inverse. Which of the following statement is valid for the resultant number?

HARD
8th CBSE
IMPORTANT

If x=3, y=27 and z=243, then which of the following is/are rational numbers?

MEDIUM
8th CBSE
IMPORTANT

The multiplicative inverse of x+1+1x-1 is _____