Find it Too SIMPLE!!!!!
Level
pending
Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc.
The answer is 3211000.
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Start with the theory that we'll have 6 zeroes - that's 6000000.
But now you need a one in the column for the number of sixes - that's 5000001.
We now don't have a six but we have a 5 and a 1 - that's 5100010.
Now we only have four 0s - 4100010.
Now no 5s but a 4 - 4100100.
Now two 1s but not accounted for. This self corrupts. Follow it through slowly! If we replace the 1 in the 1 column with a two, we'll need to account for the 2. That'll use a digit so we'll reduce the 0 count to 3. We now have a 3.
3211000.
Three zeroes. Two ones. One two. One three. No fours, fives or sixes!
Good luck getting your head around this!
I must say, I absolutely love this question!!