How many $3$-digits numbers satisfy the following conditions: The first digit is different from zero and all digits

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BTGmoderatorLU: Moderator; Posts: 2554; Joined: Sun Oct 15, 2017 1:50 pmFollowed by: 6 members

by BTGmoderatorLU » Thu May 08, 2025 5:43 pm

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How many $3$-digit numbers satisfy the following conditions: The first digit is different from zero, and all digits are different from each other?

A. $504$
B. $576$
C. $648$
D. $672$
E. $810$

The OA is C

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Source: Beat The GMAT — Problem Solving | Thu May 08, 2025 5:43 pm

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