Mathematics
How many 7 digit numbers are there in all?
90,00,000
90,00,001
89,99,999
10,00,000
Number System
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Answer
The largest 7-digit number = 9,999,999.
The smallest 7-digit number = 1,000,000.
Total Count = (Largest Number - Smallest Number) + 1
Total 7-digit numbers = 9,999,999 - 1,000,000 + 1
= 8,999,999 + 1
= 9,000,000
Hence, option 1 is the correct option.
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