Yes it is. 3x30=90
90
30, 60, 90 and so on. Multiples of 30.
8
Eight of them.
LCM = 9x5x2 = 90 all multiples are 90, 180, 270, etc
30, 60, 90 and so on.
90. All numbers that are multiples of 3, 5 & 9 are multiples of their lowest common multiple lcm(3, 5, 9) = 45 → multiples of 45 between 49 and 95 is 2 x 45 = 90.
3,6,9,12,15,18
3 of them.
30, 60 and 90
The first five positive integer multiples of 90 are: 1 x 90 = 90 2 x 90 = 180 3 x 90 = 270 4 x 90 = 360 5 x 90 = 450
They have to be multiples of 15 so all of them will be multiples of 3. They all have to be even so you are left with 30, 60, 90