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To find a number that is a multiple of both 4 and 6 and ends with 8, we first need to find the least common multiple (LCM) of 4 and 6, which is 12. Any number that is a multiple of both 4 and 6 must also be a multiple of 12. Numbers that end with 8 and are multiples of 12 include 48, 108, 168, etc.
48
It can be 0, 2, 4, 6 or 8.
If GCM stands for Greatest Common Multiple, there is no such number. This is because if x is claimed as the GCM then 2x is a common multiple of both 6 and 8 and 2x > x.