Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,685

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

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,386

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

Offline

**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.**

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,386

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,928

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.

Offline

**Primenumbers****Member**- Registered: 2013-01-22
- Posts: 141

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*

Offline