ok !!

ok !!

ok !!!

ok !!!

No guessing at all required - here, or for any of these puzzles: you just have to crunch the numbers, and correlate the rows in three different directions. Some of the correlations are extremely hard to find, though. However, once you see a pattern starting, you can often guess how it's likely to continue and fill it in; but there is always a risk you will be wrong, and so mess up the whole puzzle.

No guessing at all required - here, or for any of these puzzles: you just have to crunch the numbers, and correlate the rows in three different directions. Some of the correlations are extremely hard to find, though. However, once you see a pattern starting, you can often guess how it's likely to continue and fill it in; but there is always a risk you will be wrong, and so mess up the whole puzzle.

Isn't this upside down?

Isn't this upside down?

nice

nice

Took a lot of guessing to complete this puzzle. For starters, the symbol is upside down!

Took a lot of guessing to complete this puzzle. For starters, the symbol is upside down!

Ok, but too much guessing needed to solve these.

Ok, but too much guessing needed to solve these.