"This collection of various types of IQ puzzles is divided into three levels of increasing difficulty, with the final level intended for the expert and as fiend

Published in association with the Turing Trust, this challenging collection of number crunch puzzles will really put your numerical skills to the test. Follow i

Put your logic skills to the test with this mind-bending collection of number puzzles, published in association with The Turing Trust. Alan Turing was a World W

Published in association with the Turing Trust, this challenging collection of over 120 brain training puzzles will put your problem-solving skills to the test.

Put your crime-solving wits to the test with codes, ciphers, and more mind-bending puzzles from the groundbreaking creators of Hunt A Killer. In Hunt A Killer: