Dr. Gareth Moore 
It’s Only Logical 

Do you love juggling numbers and playing with words? These puzzles and brain-bafflers will keep you buzzing! Use language, math, and logic to… ? solve figure sequences and tricky problems ? crack codes ? answer riddles ? play lateral-thinking games …and lots more. Devised by an expert on brain training, these challenges with words, numbers, and lateral thinking will exercise your mind and imagination! There are handy tips if you need help, plus an answer key at the back!