Make the smallest valid 4 digit number using the digits 7, 6, 0, 4 exactly once.

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A 0467
B 4067
C 7640
D 7064

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Answer: B. 4067

0 can never occur at thousands place, else it is not a valid 4-digit number.
A very common Mistake is to select "Option A" as 0467, which is incorrect.

The highest possible place value of 0 is the hundreds place.
Setup the remaining digits in ascending order to get 4067.

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Make the smallest valid 4 digit number using the digits 7, 6, 0, 4 exactly once.

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