Term 1 Revision

Which set of numbers is made up only of prime numbers?

• 0, 1, 2, 3

• 2, 3, 9, 13

• 2, 5, 7, 13

• 2, 7, 17, 21

• 68

• 64

• 92

• 47

How many factors does a prime number have?

How many factors does 1 have?

• 0

• 2

• 1

How many sides does a quadrilateral have?

• 3

• 8

• 4

• 5

Which is not a prime number?

• 5

• 7

• 9

• 11

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Only have 2 factors

• Don't have factors

What number is the only even prime number?

• 4

• 2
• 6

• 5

True or False...
40 500 is divisible by 9

• True
• False

The divisibility rule for 9 is...

• Divide the whole thing by nine
• Add the digits together.  If the sum is divisible by 9, the original number is divisible by 9
• Multiply the digits together by 9
• Add the digits together and then add 9.