Unlock the Code Puzzles Book - Volume I

A selection of 200 number logic puzzles ranging from easy to taxing. The rules are simple, but the reader will require concentration, logic and deductive reasoning to find the solutions. The perfect puzzle companion for a Sunday afternoon.

THE RULES

The aim is to determine a secret code using clues provided from a series of incorrect attempts. For each attempt, the number of matching digits is shown. A matching digit in the correct position is called a “Bull” (B) and a matching digit in an incorrect position is called a “Cow” (C).

Try Yourself:
034 (1 Cow)
963 (1 Bull, 2 Cows)
160 (1 Cow)