The Number Puzzler: The Art of Cracking Number Sequences
Mullins, Roy
All the puzzles in this book take the form of number sequences and always some of the terms are missing.Sometimes the missing terms are at the end and the puzzle is to work out how the sequence continues.Sometimes there are gaps to fill within it.Logical thinking is needed to discover the hidden rules and the book systematically explains how to set about solving this intriguing type of puzzle.