Prime Numbers and Multiples

What are the factors for the number 16?

(a)  

Answer explanation

The factors of 16 are the numbers that divide it evenly. These include 1, 2, 4, 8, and 16. Therefore, the correct answer is 0, as it indicates that the answer choices provided are not the factors.

Tags

CCSS.4.OA.B.4

What are the first 5 multiples of 10?

• 5,10,15,20,25

• 10,20,30,40,50

• 100,200,300,400,500

• 1,2,3,4,5

Answer explanation

The first 5 multiples of 10 are obtained by multiplying 10 by the integers 1 through 5. This results in 10, 20, 30, 40, and 50, making the correct answer 10,20,30,40,50.

Prime numbers are numbers that have 2 or more factors.

• True

• False

Answer explanation

Prime numbers have exactly two distinct positive factors: 1 and the number itself. Therefore, the statement that prime numbers have 2 or more factors is incorrect, making the answer False.

Tags

CCSS.4.OA.B.4

Match the following

• composite

• 11

• prime

• 24

• prime

• 3

• composite

• 12

• composite

• 9

Tags

CCSS.4.NBT.B.6

Select all factors of 10 in order form LEAST to GREATEST

​ (a)   ​ (b)   ​ (c)   ​ (d)  

• 1

• 2

• 5

• 10

• 3

• 4

• 9

Answer explanation

The factors of 10 are the numbers that divide 10 without leaving a remainder. These are 1, 2, 5, and 10. The numbers 3, 4, and 9 do not divide 10 evenly, so they are not factors. Thus, the correct factors in order are 1, 2, 5, and 10.

Tags

CCSS.4.OA.B.4

10, 20, 30, 40, 50 are ​ (a)   of 10

1, 2, 5, 10 are ​ (b)   of 10

• multiples

• factors

• prime

• composite 

Answer explanation

10, 20, 30, 40, 50 are multiples of 10 because they can be expressed as 10 times an integer. Conversely, 1, 2, 5, 10 are factors of 10 since they divide 10 evenly without leaving a remainder.

Tags

CCSS.4.OA.B.4

What is a product?

• The answer to a subtraction problem.

• The answer to a division problem.

• The answer to an addition problem.

• The answer to a multiplication problem.

Answer explanation

A product is defined as the result of multiplying two or more numbers together. Therefore, the correct answer is 'The answer to a multiplication problem.'

Tags

CCSS.3.OA.A.1

How many factors does the number 9 have?

• 2

• 3

• 4

• 5

Answer explanation

The number 9 has three factors: 1, 3, and 9. Factors are the numbers that divide 9 without leaving a remainder. Therefore, the correct answer is 3.

Tags

CCSS.4.OA.B.4

The numbers which have more than two factors are called

• even

• prime

• composie

• none

Answer explanation

Numbers with more than two factors are called composite numbers. Unlike prime numbers, which have exactly two factors (1 and themselves), composite numbers can be divided by additional numbers.

Tags

CCSS.4.OA.B.4

Composite numbers:

• Are always bigger than prime numbers

• Have more than 2 factors

• Have 2 pairs of factors

• Don't have factors

Answer explanation

Composite numbers are defined as numbers that have more than 2 factors, unlike prime numbers which have exactly 2 factors. Therefore, the correct choice is 'Have more than 2 factors'.

Tags

CCSS.4.OA.B.4