Prime number game
This prime number game will really help you sharpen your basic mathematics skills.
You have 80 seconds to see how many exercises you can get correctly in 80 seconds
How to play
If the number is prime, enter "1" in the answer box.
If the number is not prime, enter "0" in the answer box.
By definition 1 is neither prime nor composite, so as you play the game, it will not prompt you to answer for 1.
Now why 1 is neither prime nor composite?
By definition, a number is prime if it has only two factors
By definition, a number is composite if it has more than 2 factors
Since 1 has only one factor, which is itself, the definition for prime or composite does not apply
Here is my guideline to verify how well you are doing:
Easy and 120 points in 80 seconds: Very well, keep up!
Easy and 2030 points in 80 seconds: good!
Easy and more than 30 points in 80 seconds: Expert!
Moderate and 115 points in 80 seconds: Very well, keep up!
Moderate and 1525 points in 80 seconds : Good!
Moderate and more than 25 points in 80 seconds: Expert!
Difficult and 110 points in 80 seconds: Very well, keep up!
Difficult and 1020 points in 80 seconds : Good!
Difficult and more than 20 points in 80 seconds: Expert!

Feb 17, 19 12:04 PM
There is no rational number whose square is 2. An easy to follow proof by contraction.
Read More
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.