The number of all natural numbers up to 1000 with non-repeating digits is
Question:
The number of all natural numbers up to 1000 with non-repeating digits is
The number of all natural numbers up to 1000 with non-repeating digits is
Options
Answer: 738
Explanation:
1-digit: 9 numbers. 2-digit: 9×9=81. 3-digit: 9×9×8=648. Total=9+81+648=738.
Explanation:
1-digit: 9 numbers. 2-digit: 9×9=81. 3-digit: 9×9×8=648. Total=9+81+648=738.
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