1. Tardigrade
  2. Question
  3. Mathematics
  4. We call a number ascending if each digit is greater than the digit that precedes it. For example, 457 is ascending, but 447 is not. Find the number of ascending numbers between 400 and 5000.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. We call a number ascending if each digit is greater than the digit that precedes it. For example, 457 is ascending, but 447 is not. Find the number of ascending numbers between 400 and 5000.

Permutations and Combinations

Solution:

Correct answer is '141'