c4countdown

A friend of a friend posted this on Facebook. I'm totally stumped, but thought he would eventually post the answer, but it turns out he doesn't know either
The question marks are either 0 or 1, but can any of you intelligent people tell me which they are, and why?



1 1 0 ? 1 1 0
0 1 0 ? 1 1 0
1 1 1 ? 0 0 0
1 0 0 ? 1 0 1
0 1 0 ? 1 1 1
0 0 1 ? 0 1 1
1 1 0 ? 1 1 1

1,10,11,100,101,110,111,1000,1001,1010,1011,1100,1101,1110,1111.

Liam, that's awesome. Nicely done
It was driving me (and a few others) absolutely nuts, so thanks very much.

How pissed off would you be if I told you it took me about 10 seconds to spot it?

Liam Tiernan wrote:How pissed off would you be if I told you it took me about 10 seconds to spot it?

Two seconds? Man you're quick.

Liam Tiernan wrote:How pissed off would you be if I told you it took me about 10 seconds to spot it?

Not pissed off at all, just very impressed. Might be inclined to be a tad peeved if you're being slightly smug (you're probably not) and implying I'm a bit dim (you're probably right)

Liam Tiernan wrote:1,10,11,100,101,110,111,1000,1001,1010,1011,1100,1101,1110,1111.

You've solved the puzzle and then posted your answer in the form of a puzzle that people still have to work out. Was that intentional?

Gavin Chipper wrote:

Liam Tiernan wrote:1,10,11,100,101,110,111,1000,1001,1010,1011,1100,1101,1110,1111.

You've solved the puzzle and then posted your answer in the form of a puzzle that people still have to work out. Was that intentional?

I don't think it was intentional. I think he just found the original puzzle so easy and trivial that he assumed everyone would immediately know that his answer was the numbers 1,2,3,...,15 written in binary.