Test: Rational Numbers - Class 7 MCQ

1 is the multiplicative identity which means that identity of the number remains intact if it is multiplied by 1

Let we have a rational number having numerator as 2 and denominator as 3. The rational form is given by :

2/3

Reciprocal of a number is such that the numerator becomes denominator and the denominator becomes numerator. So, the reciprocal of the above rational no will be :

3/2

The reciprocal of the reciprocal of a rational number will be again  2/3. Hence, the reciprocal of the reciprocal of a rational number is the number itself.

• Let the numbers be x and y
• xy = -20/9 as given by the question
• now one number is given 4 , let x = 4
• Now we just have to find y
• 4.y = -20/9
• On solving we get , y = -5/9
   

Reciprocal is the inverse of the number, meaning, the numerator becomes denominator and denominator becomes numerator.so 1/x become x/1

To determine the correct answer, we need to compare 0 with -4/9
The number 0 is greater than any negative number because it is non-negative.
-4/9 is a negative fraction, so 0 is indeed greater than -4/9
Therefore, the correct statement is:
A: 0 > -4/9
This makes option A the correct choice.

he product of two rational numbers is always a rational number.

= -6/5 + 1 
= (-6+5)/5
= -1/5