There are 4 letters in the word "MATH", so there are 4! (4 factorial) ways to arrange them.
4! = 4 × 3 × 2 × 1 = 24
So, there are $\boxed{24}$ different arrangements possible.
b. There is only 1 vowel in the word "MATH", which is "A". So, we need to find the
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