Primes and Square Roots

List the first prime

List the second prime number

5 is the 3rd Prime number

• True

• False

• What is a prime?

• Who cares?!?!?

List the 5th prime number

The numbers 5 and 6 are:

• Both prime numbers

• Both multiples of 30

• Both factors of 30

• A factor pair of 60

2 prime numbers multiplied together...

• ...must be another prime number

• ...must be an odd number

• ...must be an even number

• ...can never be a prime number

Answer explanation

If a number can be made by multiplying two numbers together, those are factors, and a prime number has no factors (apart from 1 and itself)

The best definition of a factor of the number X is:

• A number that can be made by multiplying X and another number together

• A number that goes into X

• A whole number that can be made by multiplying X and another whole number together

• A whole number that goes into X a whole number of times

Which of these is/are prime?

Select all that apply

• 9

• 11

• 13

• 15

• 17

Which of these are factors of 24?

Select all that apply

• 4

• 6

• 8

• 10

• 12

Which of these statements is/are true?

Check all that apply

• There is a finite number of factors for any number

• There is a finite number of multiples for any number

• There is an infinite number of factors for any number

• There is an infinite number of multiples for any number

• Factors of a number are always less than multiples of that number