List all the common multiples of 9,12 and 15 between 1 and 100

There is no common multiple of 9, 12 and 15 between 1 and 100

Step-by-step explanation:

The common multiples of 9, 12 and 15 between 1 and 100

Fist the lowest common multiple

9 = 3 * 3

12 = 3 * 4

15 = 3 * 5

Hence the lowest common multiple

= 3 * 3 * 4 * 5

= 180

Since the lowest common multiple of 9, 12 and 15 is greater than 100, it means that there is no common multiple of these numbers between 1 and 100

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

idk

step-by-step explanation: