Factors and Multiples

Which ones are the factors of 12

• 1,2,3,4,5,6,7,8,9,10,11,12

• 1,2,3,4,6,12

• 1,12

• 2,3,4,6

Which are multiples of 6

• 1,2,3,6

• 6,12,18,24

• 6,8,10,12

• 1,6

How many factors does 7 have

• 2

• 1

• 7

• 14

Which number is not a multiple of 9

• 3

• 9

• 18

• 27

Which number is a multiple of 2 and a factor of 48

• 10

• 3

• 12

• 7

Which list contains the factors of 15

• 15, 30 , 45

• 1,3,5,10,15

• 1,3,5,15

• 5,10,15

Which number is not a multiple of 3

• 108

• 99

• 63

• 65

Find the GCD (81, 27)

• 27

• 9

• 18

• 3

Find the LCM [20, 30]

• 60

• 150

• 120

• 90

 Euclid's division lemma states that for positive integers a and b, there exist unique integers q and r such that a=b q +r, where r must satisfy .

• 1<r<b

• 0<r<b

• 0 $\le$  r < b

• 0<r $\le$  b