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Math · Multiplying and dividing

Mystery Factor: Missing factors, fact families and division

Each problem is a detective case with a hidden number under a card. Kids find missing factors, pick facts that belong to a fact family, divide, and solve word problems. A miss opens a clue panel with the equal groups drawn out.

  • Grades3rd grade
  • Levels5, from “2s, 5s, 10s” to “Word problems”
  • A roundAbout 10 questions, a few minutes
  • PriceWith any plan, from $7.99 a month
Try it free for 7 daysSee plans and prices
A round of Mystery Factor on a phone

How Mystery Factor works

The 5 levels

  1. 2s, 5s, 10s
  2. 3s and 4s
  3. 6s to 9s
  4. Divide
  5. Word problems

What it lines up with in school

Common Core State Standards for Mathematics. Standards vary by state, so check with your kid’s teacher.

3.OA.A.3
Solve multiplication and division word problems within 100.
3.OA.A.4
Find the missing number in a multiplication or division equation.
3.OA.B.6
Treat division as a missing-factor problem.
3.OA.C.7
Multiply and divide within 100 fluently, and know the facts to 10 × 10.

Practice it at home

Questions about Mystery Factor

What grade is Mystery Factor for?
3rd grade. It’s a division game with 5 levels that move up when your kid is ready.
Which standards does Mystery Factor cover?
It lines up with Common Core math 3.OA.A.3, 3.OA.A.4, 3.OA.B.6 and 3.OA.C.7. Standards vary by state, so check with your kid’s teacher for the exact match.
Does my kid need to read to play Mystery Factor?
No. Every question is read aloud, so kids who are still learning to read can play on their own.
How long is a round of Mystery Factor?
About 10 questions, a few minutes. Nine right on the first try and the next round is a level harder; a tough round steps back one.
Is Mystery Factor free?
It comes with every plan, from $7.99 a month, with a 7-day free trial. Number Garden and Gator Compare are free.

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