perplexus.info :: Numbers : Ascending numbers!

Ascending numbers! (Posted on 2003-05-25)

Let's call n an ascending number, if it has the following 2 properties:

- The number n has at least 2 digits.
- All digits of n are in ascending order, in base 10.

How many ascending numbers are there?

See The Solution Submitted by Fernando

Rating: 3.0000 (3 votes)

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Puzzle Answer

Comment 5 of 5 |

There are precisely:

--> 1013 ascending numbers with leading zero.

--> 502 ascending numbers without leading zero.

Posted by K Sengupta on 2022-08-15 06:24:53

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