IQ Challenge (over 500 perplexing number, letter & visual puzzles)

Put your mental powers to the test in a series of fascinating and challenging puzzles.

Divided into twenty levels of ascending difficulty, each section contains a variety of questions to tease and stimulate your grey matter.

Think logical. Think rational. Think lateral.

This is the perfect book for puzzle fans who want to push their IQ levels to the maximum and enjoy hours of challenging fun.