Quiz about Number Theory (Grade 8 QUIZ)

Question 1

23 654 + 8 657 =

Accepted Answer

32 311

Answer

30 411

Answer

30 311

Answer

31 311

Question 2

4,689-2,790

Accepted Answer

1,899

Answer

1,900

Answer

1,889

Answer

889

Question 3

Solve. 80 x 5000

Accepted Answer

400,000

Answer

40,000

Answer

4,000,000

Answer

4000

Question 4

The numbers 0, 1, 2, 3, ... are called

Accepted Answer

whole numbers

Answer

integers

Answer

rational numbers

Answer

natural numbers

Question 5

Numbers like -3, -2, -1, 0, 1, 2, 3 are called

Accepted Answer

integers

Answer

whole numbers

Answer

rational numbers

Answer

natural numbers

Question 6

The smallest composite number is ______

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 7

0.8 is a rational number

Accepted Answer

True

Answer

False

Question 8

what are the first 5 prime numbers in ascending order?

Accepted Answer

2,3,5,7,11

Answer

2,3,4,5,11

Answer

1,2,3,5,11

Answer

2,3,11,7,5

Question 9

Which set lists all the factors of 24?

Accepted Answer

1, 2, 3, 4, 6, 8, 12, 24

Answer

1, 2, 3, 6, 7, 12, 24

Answer

1, 2, 3, 4, 5, 6, 8, 12, 24

Answer

1, 3, 4, 6, 8, 24

Question 10

Which lists all the factors of 40?

Accepted Answer

1, 2, 4, 5, 8, 10, 20, 40

Answer

1, 2, 4, 5, 8, 12, 14, 40

Answer

1, 2, 3, 4, 5, 8, 10, 40

Answer

1, 2, 5, 8, 20, 40

Question 11

All of the following are factor pairs of 12 EXCEPT:

Accepted Answer

3 and 5

Answer

3 and 4

Answer

2 and 6

Answer

1 and 12

Question 12

GCF of 28 and 40

Accepted Answer

4

Answer

2

Answer

7

Answer

8

Question 13

Which number is not a multiple of 12?

Accepted Answer

25

Answer

72

Answer

60

Answer

36

Question 14

Identify all the multiples of 12....

Accepted Answer

72

Accepted Answer

36

Accepted Answer

60

Accepted Answer

84

Answer

54

Question 15

What is the LCM of 45 and 72?

Accepted Answer

360

Answer

72

Answer

3,240

Answer

260

Question 16

What is the LCM of 32 and 40?

Accepted Answer

160

Answer

180

Answer

140

Answer

200

Question 17

What is the second step to solving a prime factorization problem?

Accepted Answer

Order the Prime numbers from Least to Greatest

Answer

Simplify using exponents

Answer

Break down a number using a Factor Tree

Answer

Order the Prime numbers from Greatest to Least

Question 18

What is the Prime Factorization of 144?

Accepted Answer

24 x 32

Answer

22 x 34

Answer

24 x 34

Answer

2² x 3 x 3²

Question 19

Using a Factor Tree, find the prime factorization of 75.

Accepted Answer

52 x 3

Answer

5 x 5 x 3

Answer

32 x 5

Answer

15 x 5

Question 20

Use a number tree to find the prime factorization of 64

Accepted Answer

2x2x2x2x2x2

Answer

4x4x4

Answer

4x4x2x2

Answer

4x4x2x1

Question 21

Square roots are the opposite of ____________.

Accepted Answer

Squaring

Answer

Cube Roots

Answer

Multiplication

Answer

Absolute Value

Question 22

Which of the following in not a perfect square?

Accepted Answer

111

Answer

49

Answer

81

Answer

144

Question 23

132

Accepted Answer

169

Answer

159

Answer

266

Answer

156

Question 24

182

Accepted Answer

324

Answer

334

Answer

304

Answer

316

Question 25

Use a factor tree to find the prime factorization of 105

Accepted Answer

7x5x3

Answer

11x5x3

Answer

7x5x2x1

Answer

7x5x3x2

Question 26

Pick the correct order for Order of Operations

Accepted Answer

Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

Answer

Parentheses, Multiplication, Division, Addition, Exponents, Subtraction

Answer

Exponents, Multiplication, Division, Addition, Parentheses, Subtraction

Question 27

Which operation is performed FIRST?
(13 - 1) + 4

Accepted Answer

subtraction

Answer

addition

Answer

multiplication

Question 28

(23 + 24) -10 =

Accepted Answer

37

Answer

27

Answer

47

Number Theory (Grade 8 QUIZ)

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