Prime and composite numbers

Circle the prime or composite numbers, or tick prime or composite for each number.

About this worksheet

Choose to circle the prime numbers, circle the composite numbers, or tick the right word beside each number. Numbers start at 2, so there is no need to discuss 1.

The solved example lists the factors of one number to show why it is prime or composite. In the answer key every right answer is marked in blue.

Printing

US Letter or A4, portrait: choose your paper size above. Print at 100 percent (actual size). Use "Black and white" for the copier, or "Color" for display pages and mini books.

Popular versions

Ready-made settings for common topics.

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