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If repeats are permitted: 2 x 5 x 5 = 50 different odd numbers

If repeats are not permitted: 2 x 4 x 3 = 24 different odd numbers

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Q: How many odd 3- digit positive integers can be written using the digits 1 2 4 7 and 8?
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How do you do integers greatest to least?

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How many 5 digit palindromes are there?

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