Prime Number Practise

Date: 15th Mar 2018 @ 9:58am

Following on from today’s lesson, use this game to help you practise recognising prime numbers

Remember to scroll through to find the prime number option.

Plus, bring 3 examples to prove that this trick works. Remember, you can use short division to divide by 12.

The Prime Number Trick

Using prime numbers, you can amaze your friends with a prime prediction…

  • Ask your friends to pick any prime number bigger than 5, but they must not tell you what it is.
  • Square it. (In other words multiply the prime number by itself.)
  • Add 17
  • Divide by 12

Without knowing which prime number your friends picked, you can still tell them: There will be a remainder of 6

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