Factor Race: a factors game for kids
Spot factors and primes, or find the GCF or LCM, to speed up your car. A free factors game for any device. Grades 4 to 6.
🧒 Kids: Is it a factor? Prime or composite? Tap the answer to make your car zoom! Beat the 3 computer cars to the 🏁 flag.
How to play
- Choose the questions (is it a factor, prime or composite, GCF and LCM, or a mix) and a speed: Easy, Medium or Hard.
- Press Start the race. A question appears under the track with two or three answers to choose from.
- Think and tap the answer. Every right answer moves your car forward.
- A wrong answer stalls your engine for a moment and shows the right answer.
- 15 right answers reach the flag. Beat the three computer cars to win!
What your child practices
Factors and multiples at speed. Children decide whether a number is a factor of another and whether a number to 100 is prime or composite (4.OA.B.4). They also find the next multiple, and the GCF and LCM of small numbers (6.NS.B.4). The wrong answers are the classic slips, such as the product instead of the LCM. The results screen lists every missed question with its answer.
Which setting to choose
| Setting | Example | Good for | Learn it first |
|---|---|---|---|
| Is it a factor? | Is 7 a factor of 56? | Grade 4 | factors and multiples |
| Prime or composite | 51: prime or composite? | Grades 4–5 | prime numbers |
| GCF and LCM | LCM of 6 and 8 | Grade 6 | GCF and LCM |
| Mix of all | any of the above, plus the next multiple | Grades 5–6 | factors and multiples for kids |
Grade 4 children should start with is it a factor, on Easy. Grade 6 children can try GCF and LCM and the mix.
Once your child can finish the mixed race on Medium without stalling, check with the factors and multiples quiz.
Tips for parents
- Start on Easy. Move up a speed when your child wins twice in a row.
- Keep paper handy for the first few races. Listing factor pairs is faster than guessing.
- For prime or composite, remind your child to test 2, 3, 5 and 7 first.
- Your best time for each setting is saved on this device. Racing your own best is the real goal.
- Three races a day, about 5 minutes, is plenty.
In the classroom
Put it on the projector and let children call out the answer as a class. Or have them race on tablets with the same settings and compare finishing times. No logins, and no data leaves the device.
More factor games and practice
Games: Factor Pair Match · Prime Number Bingo · all factors and multiples games · Array Builder · multiplication games · all math games
Print it: the factors and multiples worksheet, the prime numbers worksheet and the GCF worksheet, with answer keys, for practice away from the screen.
Practice: factors and multiples practice · GCF and LCM calculator · factors quiz · factors levels · grade 4 · grade 6
Last reviewed
Questions parents ask
How do you play Factor Race?
Answer factor questions, like is 7 a factor of 56 or is 51 prime, and tap the answer to move your car. 15 correct answers reach the finish. Beat the three computer cars to win.
What is in this factors game?
Is it a factor, prime or composite for numbers to 100, the next multiple, and the GCF and LCM of small numbers.
Is Factor Race free?
Yes. It is free, has no ads inside the game and needs no account.
What grade is this factors game for?
Grades 4 to 6. Grade 4 starts with factors and primes; grade 6 adds the GCF and LCM.
Does it work on phones?
Yes. The answers are big buttons, so it works well on phones and tablets as well as computers.