Number Fill-Ins: 500 Number Fill In Puzzles with SolutionsEnjoy hours of puzzle-solving enjoyment with this huge book of 500 Number Fill In puzzles. 500 puzzles over 20+ different for puzzle grid layouts for hours of brain-stimulating fun! No optional clues or starting numbers so you decide your level of challenge.But if you do need help then there are answers for each number-fill puzzles at the back of the book.Many dozens of numbers to find on each puzzle to help Improve your cognitive ability and deductive reasoning This is a great gift for adult puzzlers of any skill level Quality paper for an improved puzzle solving experience. Give your brain some gentle relaxation and exercise while you figuring out which number fits which pattern. Use a pencil and keep an eraser nearby just in case you need it. And remember to allow yourself the a peek at the answers in the back of the book if you get stuck. Printed on quality paper so sharp pencils or gentle erasing won't easily damage the pages. Great fun for the whole family! " FEATURES500 Puzzles with Solutions20+ different puzzle grid layouts for varietyNo clues or starting numbersSize 8.5 inch X 11 inchQuality paperQuality matte cover