Mark against the correct answer
How many 4-digit numbers are there?
(a) 8999
(b) 9000
(c) 8000
(d) none of these
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Solution
Option b is correct.
The largest four-digit number = 9999
The smallest four-digit number = 1000
Total number of all four-digit numbers = (9999 − 1000) + 1
= 8999 + 1
= 9000