Find the difference between the largest 7 digit number using 4 different digits and the smallest 7 digit number using 4 different digits
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Step-by-step explanation:
Smallest number other than 0 is 1, so we shall take 1. Thereby, we shall place 0, (can be repeated four times) then 2 and then 3 will complete 7 digits. Thus the smallest 7 digit number with four digits will be 1000023.
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