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Prime & Composite Basics

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Prime & Composite Basics

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Prime vs composite quiz

Created by

Milagros Valdivia
Milagros Valdivia
Philippines

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Prime & Composite Basics
 

Prime & Composite BasicsOnline version

Prime vs composite quiz

by Milagros Valdivia
1

What is a prime number?

2

Which number is prime?

3

Is 1 a prime number?

4

Which number is composite?

5

True or False: All odd numbers greater than 2 are prime.

6

Is 2 a prime number?

7

Is 4 a prime number?

8

Which statement about primes is true?

9

Which of the following numbers is prime?

10

How can you tell a prime number from a composite number?

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Prime numbers have exactly two distinct divisors. Even numbers can be composite; 1 has only one divisor.

Prime numbers have no divisors other than 1 and themselves; 15, 21, 25 are composite.

By definition, primes are >1, so 1 is not prime.

Composite numbers have more than two divisors; 15 = 3×5.

Many odd numbers like 9, 15 are composite.

2 is the smallest and only even prime number.

4 has divisors 1,2,4, so it is composite.

Only primes have exactly two distinct divisors; 1 has one divisor.

19 is prime; 9, 12, and 18 are composite.

If a number has more than two divisors, it is composite; primes have exactly two.

 
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