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Xiao Ming does more than 20 math problems, but less than 25, and it is a multiple of 8. What is the number?
The multiples of solution 1 and 8 are 8, 16, 24 and 32.

More than 20 but less than 25, so there are only 24 matches.

Solution 2: Numbers greater than 20 and less than 25 are: 2 1, 22, 23, 24, and only 24 is divisible by 8, so this number is 24.

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