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60.

There are 5 different choices for the first digit, four for the second digit, and three choices for the third digit. According to the fundamental counting principle, you multiply them together to get the total number of possible ways, and 5 x 4 x 3 = 60

Another way to think about it is 5!/3!

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Q: If you are not allowed to repeat a digit how many 3-digit numbers can be made from the digits 1 2 3 4 and 5?
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