How many seven-digit numbers are there when 0 and 5 cannot be the leading number?

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asked Sep 25, 2018 3.5k views

1 Answer

Mizhgun · Answer 1 · 2018-10-02T06:44:54+0000

1,2,3,4,6,7,8,9
8 numbers

if you can repeat then
8*10⁶ numbers or 8000000 different numbers

if you can use each number only once then
8*9*8*7*6*5=120960 different numbers

How many seven-digit numbers are there when 0 and 5 cannot be the leading number?

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How many seven-digit numbers are there when 0 and 5 cannot be the leading number?