1.1 Different types of numbers

Question 1

Natural number

Answer 1

Any whole number from 1 to infinity, sometimes
called ‘counting numbers’. 0 is not included.

1, 2, 3, 4, 5, . . .

Question 2

Odd number

Answer 2

A whole number that cannot be divided exactly by 2.

1, 3, 5, 7, . . .

Question 3

Even number

Answer 3

A whole number that can be divided exactly by 2.

2, 4, 6, 8, . . .

Question 4

Integer

Answer 4

Any of the negative and positive whole numbers, including zero.

. . . −3, −2, −1, 0, 1, 2,
3, . . .

Question 5

Square number

Answer 5

The product obtained when an integer is multiplied by itself.

1, 4, 9, 16, . . .

Question 6

Fraction

Answer 6

A number representing parts of a whole number,
can be written as a common (vulgar) fraction in
the form of a/b or as a decimal using the decimal point.

1/2
1/4
1/3
1/8
1/3
3/1
0.5, 0.2, 0.08, 1.7

Question 7

List the natural numbers from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 7

3, 4, 6, 11, 16, 19, 25

Question 8

List the odd numbers from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 8

-1, 3, 11, 19, 25

Question 9

List the integers from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 9

-4, -1, 0, 3, 4, 6, 11, 16, 19, 25

Question 10

List the negative integers from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 10

-4, -1

Question 11

List the fractions from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 11

1/2, 0.75

Question 12

List the square numbers from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 12

0, 4, 16, 25

Question 13

List the prime numbers from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 13

3, 11, 19

Question 14

List the numbers that are neither square nor prime from the set {-4, -1, 0, 1/2, 0.75, 3, 4, 6, 11, 16, 19, 25}.

Answer 14

-4, -1, 0, 1/2, 0.75, 6