Question: A small combination lock on a suitcase has 6 wheels, each labeled with the 10 digits 0 to 9. How many 6 digit combinations are

A small combination lock on a suitcase has 6 wheels, each labeled with the 10 digits 0 to 9. How many 6 digit combinations are possible if no digit isrepeated? If digits can berepeated? If successive digits must bedifferent?

The number of different 6 digit combinations possible if no digit is repeated is ____.

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