FACTORS AND MULTIPLES

Is 13 a multiple of 26

• YES

• NO

• CAN BE

• NOT SURE

Answer explanation

26 is a multiple of 13

but 13 can never be a mutiple of 26

Which number is not factor of 91?

• 7

• 1

• 13

• 9

Answer explanation

9 is not a factor of 91 because sum of the digits is 9+1=10

10 is not divisible by 9

so, 9 is not a factor of 91

Tags

CCSS.4.OA.B.4

Which of the statements is True?

• All numbers have three factors

• 2 is a factor of every number

• 1 is a factor of every number

• all odd numbers have odd numbers as factors

Answer explanation

1 is the factor of every number. 1 is divisible by each and every number.

Tags

CCSS.4.OA.B.4

Which of the following is not a prime number?

• 87

• 73

• 29

• 51

Answer explanation

8+7=15

15 is divible by 3

So, 87 is not a prime number

Tags

CCSS.4.OA.B.4

Which number is a common factor of both 24 and 36?

• 7

• 12

• 9

• 5

Answer explanation

24,36 both come in the table of 12.

so 12 is the factor of both 24 and 36.

Tags

CCSS.4.OA.B.4

Which of the following correctly lists the factors of the number 28?

• 1,2,3,4

• 1,2,4,7,14,28

• 1,2,4,7,8,6,14,28

• 1,28

Answer explanation

1,2,4,7,14,28 are the factors of 28

Tags

CCSS.4.OA.B.4

How many factors does a Prime number have?

• 1

• 2

• 3

• 4

Answer explanation

Prime numbers are those numbers which are divisible by 1 and the number itself.

Tags

CCSS.4.OA.B.4

The number 1 is _______

• A prime number

• A composite number

• Both a Prime and Composite number

• Neither a Prime or Composite number

Answer explanation

1 is neither prime nor composite

as 1 has only one factor i.e., 1 only.

prime numbers have 2 factors and composite numbers have more than two factors

Tags

CCSS.4.OA.B.4

Of the following list of numbers: 2,3,4,7,8,11,12, which are Composite numbers?

• 2,3,4

• 4,11,12

• 2,3,7

• 4.8.12

Answer explanation

4,8,12 have more than two factors. So, they are composite numbers.

Tags

CCSS.4.OA.B.4

Which of the following lists the prime factorization of the number 28? 

• 2,2,3

• 2,2,7

• 2,4,6

• 2,14

Answer explanation

2*2*7=28