What number between 55 and 101 is a multiple of 2 6 8?

All multiples of their lowest common multiple are multiple of all of them.

lcm(2, 6, 8) = 24

55 ÷ 24 = 2 r 7 → first multiple of 24 greater than 55 is 3 x 24 = 72

101÷ 24 = 4 r 5 → last multiple of 24 less than 101 is 4 x 24 = 96

→ the numbers 72 and 96 are multiples of 2, 6 & 8 between 55 and 101.