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Question
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How many 8-digit numbers are there?
Options
99999999
89999999
90000000
none of these
Solution
The largest eight-digit number = 99999999
The smallest eight-digit number = 10000000
Total number of eight-digit numbers = (99999999 − 10000000) + 1
= 89999999 + 1
= 90000000
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