3. How many 8-digit numbers are there in all?
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Answer:
90000000 8-digit numbers are there in all.
Step-by-step explanation:
Largest 8-digit no. = 99999999
Smallest 8-digit no. =10000000
No. of 8-digit no. =(99999999-10000000)+1
=89999999+1
=90000000
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