5.4A Prime and Composite Numbers

QuizÂ by Wendy Tamney

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3 questions
• Q1
Which of the following is NOT a composite number?
76
39
2
15
60s
• Q2
The factor tree for the number 45 is shown. According to the factor tree, which of the following statements is NOT true?
The number 5 is a composite number.
The number 3 is a prime number.
3 and 5 are the prime factors of 45.
9 and 45 are not prime numbers.
60s
• Q3
Yani uses blocks to show the difference between prime and composite numbers. The diagrams below represent some of Yani's models. Which of the models represent prime numbers?
7 and 11
8, 9, and 10
7, 9, and 11
8 and 10
60s

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