**What is a Prime Number?**

**Free Math Vocab Wall Posters**

**What is a Prime Number?**

A prime number can ONLY be divided by itself AND one. Primes have two distinct factors, themselves and one.

So when someone asks, ‘Is 1 a prime number?’ You can confidently say no and refer them to the poster below and mention how ‘itself’ **IS** one 😉

**List of Primes from 1 to 100 **– A Poster for the Math Wall

The list of primes from 1 to 100 is shown in blue on the poster above. Did we get them all?

**THE FIRST 100 PRIME NUMBERS?**

This poster lists the first **100 prime numbers** and encourages students to explore the properties of numbers.

If a number ends with 0, 2, 4, 6 or 8 it is EVEN.

If a number ends with 5 or 0 it can be divided by 5. (Except for 5 itself)

Hint – Have a look at the last digit of each number and apply the above rules.

Have we made a mistake with any of the numbers listed above?

This poster can be added to your Math Vocabulary Display as a form of Math Help reference material 🙂

**Where to Next?**

– Maybe you’d like a poster that answers, **‘Is One a Prime Number?’
**

**‘Is Two a Prime Number?’**

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