“Usually people look at you when they're talking to you. I know that they're working out what I'm thinking, but I can't tell what they're thinking. It is like being in a room with a one-way mirror in a spy film.”

“The rule for working out prime numbers is very simple, but no one has ever worked out a simple formula for telling you whether a very big number is a prime number or what the next one will be. […] Prime numbers is what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.”

“I like dogs. You always know what a dog is thinking. It has four moods. Happy, sad, cross and concentrating. Also, dogs are faithful and they do not tell lies because they cannot talk.”

“Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.”

“I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them”

“... He had always rather liked emergencies. Other people's at any rate. They put your own problems into perspective. It was like being on a ferry. You didn't have to think about what you had to do or where you had to go for the next few hours. It was all laid out for you.”

“Being clever was when you looked at how things were and used the evidence to work out something new.”