Greatest common factor game
This greatest common factor game will really help you practice and master this skill.
You have 2 minutes to answer questions
You should use any means necessary to get the answer, such as mental math, paper, and pencils.
However, I strongly recommend that you do not use a calculator!
Here is my guideline to verify how well you are doing:
Easy and 1525 points in 2 minutes: Very well, keep up!
Easy and 2535 points in 2 minutes: good!
Easy and more than 35 points in 2 minutes: Expert!
Moderate and 515 points in 2 minutes: Very well, keep up!
Moderate and 1525 points in 2 minutes : Good!
Moderate and more than 25 points in 2 minutes: Expert!
Difficult and 310 points in 2 minutes: Very well, keep up!
Difficult and 1020 points in 2 minutes : Good!
Difficult and more than 20 points in 2 minutes: Expert!

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