Multiples, Primes and Factors

Which of the following are prime numbers?

3,11,15,19,21,23,27,29,31,37,39,47,51,59,61,67,72,73,87,99

(write in numberical order seperated by commas)

Write down the first 5 multiples of 4 (after 4)

Write down the first 5 multiples of 10 (after 10)

Write down the first 5 multiples of 11 (after 11)

Write down the first six multiples of 4 and 6. What are the first two common multiples of 4 and 6

Write down the first six multiples of 3 and 5. What is the lowest common multiples of 3 and 5

What are the factors of 6

• 2,3

• 6,12,18,24

• 1,2,3,6

• 2,3,6

What are the factors of 9

What are the factors of 24

Is 263 a prime number? How many number do you need to divide 263 by to figure it out ?