This math topic focuses on identifying prime numbers from a pair of numbers. It involves comparing two numbers and determining which one is a prime number. The problems progress from easier pairings to more challenging ones, enhancing the learner's ability to recognize prime numbers in various contexts. This is part of a broader unit that introduces factoring and prime numbers.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Which Number of a Pair is Prime Worksheet

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Which Number of a Pair is Prime
1
Which of these two numbers is a prime number?
21,23
a
21
b
23
2
Which of these two numbers is a prime number?
13,15
a
13
b
15
3
Which of these two numbers is a prime number?
33,37
a
33
b
37
4
Which of these two numbers is a prime number?
2,6
a
2
b
6
5
Which of these two numbers is a prime number?
11,26
a
11
b
26
6
Which of these two numbers is a prime number?
23,25
a
23
b
25
7
Which of these two numbers is a prime number?
9,11
a
9
b
11
8
Which of these two numbers is a prime number?
47,51
a
47
b
51