Make a book of puzzles to print, or save it as a PDF. It goes from a gentle warm-up to properly hard. The answers are at the back.
Every pack number gives a different set of puzzles. Pack 1 is always the same Pack 1, so friends can race each other on it. Each puzzle has exactly one answer.
The book takes a few seconds to make. Then press “Print or save as PDF”.
In a hurry? Download Pack 1, ready to print: A4 PDF · US Letter PDF