Print Takuzu grids in sizes from 6x6 to 12x12 with the answers on the last page. The printout shows black and white circles as a filled and an empty circle, so it needs no colour printer.
What a page looks like
A puzzle as it printsIts answer, on the last page
Printing tips
On paper, write 0 and 1 instead of drawing circles: it is faster with a pencil, and the rules are exactly the same.
Which size to print
A 6x6 or 8x8 grid suits a first sheet or a child learning the rules. The 10x10 daily size fits two to a page, and a 12x12 is a long solve that deserves a page of its own. Given circles print filled or hollow, so the grid reads the same on any printer.
Using the answer key
Takuzu answers are quick to compare line by line. Count the black circles in your row against the key before you check single cells: a row with the wrong balance is the usual sign of a slip several moves back.