45, and all of its multiples
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
it would be 81 since it is a multiple of 9
180
18
18
36.
7 & 9 only have one factor in common: 1. So the number which is a multiple of both is 7 x 9 = 63.
There are 5 multiples of 9. There are 4 multiples of 12. There is 1 number that is a multiple of both, 36.
If the number is even, it is a multiple of 2 If the sum of the digits make a number divisible by 3, the number is a multiple of 3 If the number ends in 5 or 0, the number is a multiple of 5 If the number is divisible by 2 and 3, the number is a multiple of 6 If the sum of the digits make a number divisible by 9, the number is a multiple of 9