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Subject :IMO    Class : Class 8

Which of the following options is INCORRECT?

A The rational number 0 is the additive identity for rational numbers.
B The additive inverse of the rational number a/b is –a/b and vice-versa.
C Rational numbers are closed under the operations of subtraction, multiplication and division.
D There are infinite rational numbers between any two rational numbers.


both a and c option is false.so which to chose

Ans 1:

Class : Class 8
How

Ans 2:

Class : Class 10
how

Ans 3:

Class : Class 8
i understood it now, it is that only non zero rational numbers are closed in division, that is why it is false cause they said all and not nonzero

Ans 4:

Class : Class 8
Exactly. How?!

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