With Volume 3 of this all new 180 Number Fill In puzzle book, you will enjoy hours of mind-challenging entertainment. Each puzzle grid comes with a starter number set (if you want to use it) to get started faster. Puzzles within this word fill ins special size Volume 3 have two (2) Fill-In Puzzles per page, are printed in medium-size 11-point type font on 8-1/2 x 11-inch quality paper with grids having ample size to write on the number fill in puzzles. No special knowledge is needed to enjoy the mind-stimulating challenge of completing puzzles in a numbers fill in book. All the numbers to fill in a puzzle are shown in clue number lists around the puzzle grid. There is only one unique solution to each fill-in number puzzle. To solve a number fill-in puzzle you only need to look for numbers of a certain length that fit into the same length of a white space area in the puzzle grid, either vertically or horizontally. Correct numbers will cross with other numbers in the grid and share a single digit number as you fill in the puzzle. Number clues are listed by the number of digits in a set of numbers for easy reference while completing the fill in number puzzles that are sized 15x15 columns. If you could use some additional help to start, you can always look at the Solutions in the back of this Number Fill-In puzzle book.