Prime and Composite Numbers Sort and Riddle – 4th Grade Math Activity

Fourth graders decide whether each number is prime or composite, then use their answers to reveal a hidden joke. The riddle makes the activity self-checking. If the answer doesn’t make sense, students recheck their work.

What’s included

• Prime or composite sorting activity, where students classify numbers as prime or composite
• Self-checking riddle
• Answer key, for quick grading or as another self-checking option

How to use it

This is a no-prep printable. Print it and hand it out for math centers, early finishers, small groups, or homework. Students can work individually or with a partner.

The practice develops factor fluency and helps build a strong number sense foundation.

Quick facts

• Skill: identifying prime and composite numbers
• Grade: 4
• CCSS: 4.OA.B.4
• Answer key: included

Bundles and related resources

This activity is available in my 4th Grade Patterns Curriculum Unit.

Free resources

Get my free Warm Up Slides templates.

Terms of use

By purchasing this product, you own a license for one teacher only for personal use in their own classroom. Licenses are non-transferable and therefore can not be passed from one teacher to another. If the teacher who purchased this license leaves the classroom or changes schools, the license and materials leave with that teacher. No part of this resource is to be shared with colleagues or used by an entire team, grade level, school or district without purchasing the correct number of licenses. If you are a coach, principal or district interested in transferable licenses that would accommodate yearly staff changes, please contact me for a transferable license quote at lindsay@beyondtheworksheet.com.

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