Definition of types of numbers and directed numbers

What is a natural number

• A number that is divided by 2 and leave a remainder

• All positive numbers excluding 0

• A number with 1 and itself as a factor

What is an even number?

• A number that leaves a remainder of 1 when divided by 2

• A number that leaves no remainder when divided by 2

• All counting numbers

• A number with only 1 and itself as a facto

List even numbers in the range (1 - 20)

(a)  

What is a prime number?

• A whole number greater than 1 that has only 1 and itself as factors

• A number that is divisible by 2 exactly

• Another form of odd numbers

• All counting numbers

Choose the correct set of prime numbers

• (1, 2, 3, 4, 5)

• (3, 5, 7, 29, 31)

• (2, 4, 6, 8, 10)

• (10, 20, 30, 40, 50)

What distinguishes an odd number and a prime number?

Answer explanation

The number 1 is an odd number but it is not a prime number

What -7 + 9

• 2

• -2

• 4

• 16

What -7 - 7

• -7

• -14

• 21

• 0

What is -9 multiplied by 4

• 36

• 5

• -36

• -33

What -2 multiplied by -4

• 6

• 5

• 8

• -8