Self-describers

Logic Level 4

There is a particular 7 digit integer that describes itself. The 1st digit tells how many 0's there are in that number, the 2nd tells of how many ones, 3rd for twos and so on.

This is part of the Set .

What is that 7 digit number?


The answer is 3211000.

Xiaoying Qin by Xiaoying Qin , 95, USA

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

2 solutions

Saya Suka
May 7, 2021

The answer for 1, 2 and 3 digits for this question does not exist, so the smallest one is actually 1210 (n = 4 = 1 + 2 + 1 + 0).

1210
2020
21200
3211000
42101000
521001000
6210001000


0 Helpful 0 Interesting 0 Brilliant 0 Confused
Xiaoying Qin
Nov 27, 2015

Well, there's no definite solution for this problem, but the easiest way to do it would be to build it up from 1.

1 digit- 1

2 digit- 10

3 digit- 200

4 digit- 2020

5 digit- 21100

6 digit- none?

so 7 digit- 32211000.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...