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Whole Numbers Quiz - CBSE Class 6 Mathematics

Free practice quiz: Whole Numbers (CBSE Class 6 Mathematics). 15 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 6 Mathematics practice quiz has 15 multiple-choice questions on Whole Numbers, and 15 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

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Whole numbers and their order

Whole numbers are the natural numbers together with zero. They go on forever; there is no largest whole number.
Every whole number has a successor, the next number. Every whole number except zero has a predecessor, the number just before it.

Successor of n

\[n + 1\]

Predecessor of n (n is not zero)

\[n - 1\]

Common mistake: Thinking zero is not a whole number, or that fractions and negative numbers are whole numbers.

Addition and subtraction are inverses

Addition combines amounts. Words like 'more', 'total' and 'altogether' usually mean add.
Subtraction undoes addition. Use it to find a missing part when the total and one part are known.

Order does not matter in addition

\[a + b = b + a\]

Finding a missing part

\[a + b = c \Rightarrow b = c - a\]

Common mistake: Thinking subtraction can be done in any order. In general, a − b is not the same as b − a.

Multiplication, division and remainders

Multiplication is repeated addition. Words like 'each' and 'every' often mean multiply.
Division undoes multiplication. The quotient is how many times the divisor fits; the remainder is what is left over.

Order does not matter in multiplication

\[a \times b = b \times a\]

Finding a missing factor

\[a \times b = c \Rightarrow a = c \div b,\ b \neq 0\]

Division rule

\[\text{Dividend} = \text{Divisor} \times \text{Quotient} + \text{Remainder}\]

Remainder is always smaller than the divisor

\[0 \le r < b\]

Common mistake: Writing a remainder that is equal to or bigger than the divisor. This means you can still divide further.

Squares and brackets first

The square of a number is that number multiplied by itself.
Always solve the part inside brackets first. Then do the multiplication, and do addition last.

Square of a

\[a^2 = a \times a\]

Distributive property

\[a \times (b + c) = a \times b + a \times c\]

Common mistake: Reading a² as a × 2. A square means the number multiplied by itself, not doubled.

Exam tips

Count digits from left to right, one place for each digit, to find how many digits a number has.
Check a subtraction answer by adding it back, and a division answer by multiplying back.
In word problems, underline key words like 'more', 'each' or 'left' to choose the operation.

Beta: made with AI and checked by a second AI. A teacher has not reviewed it yet.

Sample questions

What is the smallest whole number?
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Answer: B. 0
Whole numbers start from 0. Therefore, the smallest whole number is 0.
What is 15 - 8?
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Answer: B. 7
Subtracting 8 from 15 results in 7.
What is the remainder when 10 is divided by 3?
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Answer: A. 1
10 divided by 3 gives a quotient of 3 and a remainder of 1.
What is the square of 5?
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Answer: C. 25
The square of a number is the number multiplied by itself. So, 5 × 5 = 25.
If a family has 5 members and each member has 2 bicycles, how many bicycles are there in total?
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Answer: A. 10
Total bicycles = 5 members × 2 bicycles/member = 10 bicycles.

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