can you figure this out?

i got this in a forward message:
Find the error, its almost impossible:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Did you know that 80% of UCDS students could not find the error above?
Forward this to at least 5 people with the title
'Find the error, it's impossible',
and when you click 'Send',
the answer will be right in front of your eyes!

Answer

Its not the spaces.
I tested it.
Haha XD im lame/
So it's either the fact that it's the wrong 'its'
or that it says 'find the error', when there is none.
its a little contradicting.

Answer2

the error is "its", which should be "it's", like it is in the forwarded title

the numbers are all "1"s, I copied to wingdings, and all the 1's are the same character

Answer3

It's suppose to be IT'S with the apostrophe. I didn't look at the answer since I got that message years ago. I accidentally called everyone who didn't know the answer "imbeciles" but then i said sorry...

Answer4

i- I
its= it's
lmao
the numbers are all rightt
alsoo,m in between the 17 and 18,, and the 18 and 19, havebigger spaces then the rest

Answer5

The numbers get bigger and the spaces between them become larger.
(No zero haha)

Answer6

I would say something that has to do with spaces. Look at the three.

Answer7

The answer is no. i cannot figure this out