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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,694

Have a try of this little Prime Numbers Activity and tell me what you think!

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,637

hi MathsIsFun

That's a useful little activity that could be a helpful part of a lesson on primes.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob Bundy

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi;

Should illustrate the fact that after you highlight 13 you are done.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

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**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,637

below number block wrote:

Question: do you have to continue marking the whole chart, or can you stop at some point?

I think it's a good teaching point to allow students to think about this themselves.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob Bundy

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 28,987

Hi MathsIsFun,

bobbym wrote:

Should illustrate the fact that after you highlight 13 you are done.

I agree.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**Primenumbers****Member**- Registered: 2013-01-22
- Posts: 147

Better to start at the beginning isn't it.......... I think it should make a noise when you find a prime.

**"Time not important. Only life important."*** - The Fifth Element 1997*

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