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Class 9 Maths Mcqs

Q:

Find the incorrect option (Assume conventional notations).

A) Q = p/q where p and q are integers and q=0 B) N = {1, 2, 3…}
C) W = {0, 1, 2, 3…} D) Z = {…-2, -1, 0, 1, 2…}
 
Answer & Explanation Answer: A) Q = p/q where p and q are integers and q=0

Explanation: Q = p/q where p and q are integers and q = 0 is an incorrect option. In the option, q=0 is given which is incorrect it should be q ? 0. All other options are correct since N set includes all positive integers, W set includes all integers and zero and Z set includes zero and all positive and negative integers.

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Category: School MCQs
Sub Category: Class 9 Maths Mcqs

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Q:

Integer numbers set is denoted by which letter?

A) N B) W
C) Q D) Z
 
Answer & Explanation Answer: D) Z

Explanation: Integers are denoted by Z where Z contains {…-2, -1, 0, 1, 2 …}.

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Category: School MCQs
Sub Category: Class 9 Maths Mcqs

64
Q:

Which of the following is Natural number?

A) 3.5 B) 7
C) 0 D) -2
 
Answer & Explanation Answer: B) 7

Explanation: Natural numbers contains {1, 2, 3…}.
3.5 is not an integer, so it is not natural number.
0 and -2 are not natural numbers because they are not the part of natural numbers’ set.

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Category: School MCQs
Sub Category: Class 9 Maths Mcqs

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