Crack the Safe: Level 1
Logically deduce the 3-digit combination for each lock and CRACK THE SAFE! These 30 unique puzzles are a delightful exercise in pure logic. Starting at an easy, introductory level, they progress to a challenging conclusion.
Full description below.
This book consists of 30 puzzles, as well as detailed solution tutorials. Each puzzle involves finding the correct combination for a combination lock, given certain clues regarding the "closeness" of some incorrect guesses.
The puzzles progress in order from easiest to more difficult. All lock combinations in this Level 1 book contain three unique digits - no digits are repeated.