45, and all of its multiples
A number that is divisible by both 5 and 9 must be a multiple of their least common multiple (LCM). The LCM of 5 and 9 is 45. Therefore, any multiple of 45, such as 45, 90, or 135, will be divisible by both 5 and 9.
Both 9 and 5 go into 45, which is the least common multiple (LCM) of the two numbers. To find the LCM, you can list the multiples of each number (9: 9, 18, 27, 36, 45, ...; 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, ...), and identify the smallest common multiple. Therefore, 45 is the smallest number that both 9 and 5 divide evenly into.
900
LCM(5, 9) = 45
As 9 is a multiple of 3, any multiple of 9 will do : 9,18,27,36,45,....
Which number is a factor of 10 , but not a multiple of 5
180
it would be 81 since it is a multiple of 9
36.
18
18
There are 5 multiples of 9. There are 4 multiples of 12. There is 1 number that is a multiple of both, 36.