🧠 Grade 4 Math Quiz · Number Theory
Composite Numbers Practice Questions
70 Grade 4 questions on Composite Numbers. Choose an answer to get instant feedback and a short explanation — the first 10 are free.
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Practice Questions
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Which number is a composite number?
Explanation:
4 has more than two factors: 1, 2, 4.
A composite number has:
Explanation:
More than two different factors.
Is 9 a composite number?
Explanation:
9 = 1 × 9 and 3 × 3 (more than two factors).
Which of these is composite?
Explanation:
15 = 3 × 5.
The smallest composite number is:
Explanation:
4 is the smallest composite number.
Which number is NOT composite?
Explanation:
29 is prime.
How many factors does 12 have?
Explanation:
12 has 6 factors: 1,2,3,4,6,12.
A number greater than 1 that is not prime is called:
Explanation:
It is a composite number.
Is 25 a composite number?
Explanation:
25 = 1, 5, 25 (three factors).
Which is a composite number?
Explanation:
21 = 3 × 7.
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