They are: 1, 2, 3, 4, 5.
30, 60, 90, 120, 150
Any three-digit multiple of 60, from 120 to 960, has the first five counting numbers as factors.
30 and 60
15 and 30 are factors of 60. The factors of 60 include the factors of 15 and 30. 45 is not a factor of 60.
60
There are four: 1, 2, 3 and 6
81 only has five factors.
First you find the factors of 45 and 60. The Factors of 45 are:1,3,5,9,15,and 45 The Factors of 60 are:1,2,3,4,5,6,10,12,15,20,30,60 The GCF is the highest common number so the GCF is 15.
First three common multiples of 5 and 6 are 30, 60 and 90.
Nine has three factors.
There are only four factors ! They are 1,2,13 & 26
60, 120, 180.....