How many 3 -digit numbers can be formed if the leading digit cannot be zero and repeats are not allowed?
A) 997
B) 504
C) 810
D) 648
E) 900

Name: How many 3 -digit numbers can be formed if the leading digit cannot be zero and repeats are not allowed? A) 997 B) 504 C) 810 D) 648 E) 900
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Question

Quizplus · Accepted Answer

The first digit has 9 options (1-9), the second digit has 9 options (0-9 excluding the first digit), and the third digit has 8 options (excluding the first two digits). Thus, 9 * 9 * 8 = 648.

How Many 3 -Digit Numbers Can Be Formed If the Leading