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Details for problem "Prime test"

Quickname: 6003

Suitable for K-12 grades: Grade 5 Grade 6

Elementary School, Primary School, Junior High School, Middle School.


Determine if number is prime.


Determine if number is prime. (Example for this math problem)


A positive natural number is given. A statement has to be made on whether this is a prime number or explain why it’s not.

A very concrete type of problem, when working with prime numbers in fifth-grade or sixth-grade, to be used as a "do now" bell-ringer activity, anticipatory set, closure exercise. This math problem would also be perfect for a quick assessment tool. The level of complexity can be controlled by selecting several problems and the magnitude of numbers used in the worksheet.

By completing this worksheet successfully, the following milestones can be achieved.

The number of problems and the number range for the number to be worked on can be chosen. Prime test will be done for given numbers. The number range is up to 100000. The answer key will identify a given number as a prime number and if it’s not a prime number, a factor set of a given number is mentioned as proof or explanation.

Topics: Divisibility Puzzles

Tags: Prime

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Customization options for this problem

Possible values
Number of problems
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Number range
50, 100, 200, 500, 1000, 2000, 5000, 10000
Greatest factor
no limit, 7, 19, 47, 97

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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