All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Numbers
Using its own digits (Posted on 2018-05-31) Difficulty: 3 of 5
a.What two-digit number equals the product of units' digit by the factorial of tens' digit?
b. What if a non-decimal system (base below ten) were allowed?

See The Solution Submitted by Ady TZIDON    
No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): beyond base 10, analytical solution....TBC | Comment 5 of 9 |
(In reply to re: beyond base 10, analytical solution....TBC by Ady TZIDON)

Judging by the title "beyond base 10" I'm sure Daniel had in mind extending the puzzle to bases higher than ten, such as the following computer-generated cases:


base the two digits
 5    3 3
10    3 6
15    3 9
20    3 12
23    4 4
25    3 15

The only assurance needed is that the base is at least one higher than either of the digits.

  Posted by Charlie on 2018-06-01 08:45:40
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information