how many different 7 digit combinations can you make?

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how many different 7 digit combinations can you make?

2007-09-26 11:19:11 · 3 answers · asked by watson101303 2 in Science & Mathematics ➔ Mathematics

3 answers

Depends on whether leading zeros are allowed... if not, then the first digit has to be 1 through 9, the remaining digits can be 0 through 9.

That works out to:
9 x 10 x 10 x 10 x 10 x 10 x 10 = 9 million combinations

2007-09-26 11:23:09 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋

assume number can be repeated

10^7 = 10,000,000

2007-09-26 11:22:57 · answer #2 · answered by 7 · 0⤊ 0⤋

depends, does order matter?

2007-09-26 11:22:34 · answer #3 · answered by imajesuslover21 2 · 0⤊ 0⤋