Question

How many four digit numbers are there in all​

Answer 1

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➢There are 4 digit numbers from -9999 to -1000 and from 1000 to 9999, so the total number of 4 digit numbers is 18,000.

Answer 2

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➢There are 4 digit numbers from -9999 to -1000 and from 1000 to 9999, so the total number of 4 digit numbers is 18,000.