Prime and Composite Numbers
Math ⇒ Number and Operations
Prime and Composite Numbers starts at 6 and continues till grade 12.
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See sample questions for grade 10
Explain how to determine if a number is prime.
Explain why 1 is neither a prime nor a composite number.
Explain why 49 is a composite number.
Explain why every even number greater than 2 is composite.
Find the sum of all prime numbers less than 10.
List all the prime numbers between 10 and 30.
List all the prime numbers between 50 and 70.
List the first five composite numbers.
Which of the following is a prime factorization of 60?
(1) 2 × 2 × 3 × 5
(2) 2 × 3 × 10
(3) 3 × 4 × 5
(4) 2 × 5 × 6
Which of the following is NOT a composite number?
(1) 15
(2) 21
(3) 23
(4) 27
Which of the following numbers is a composite number?
(1) 17
(2) 19
(3) 21
(4) 23
Which of the following numbers is a composite number?
(1) 73
(2) 79
(3) 81
(4) 83
Fill in the blank: A composite number has more than _______ positive divisors.
Fill in the blank: The number 1 has _______ positive divisors.
Fill in the blank: The number 100 is a _______ number.
Fill in the blank: The number 15 has _______ positive divisors.
Is 101 a prime number?
Is 121 a composite number?
Is 143 a composite number?
Is 2 a composite number?
