'What have you done? Have you thought about opening the diary?"

'No ... I waited for you to go and see if Da Vinci could help us. Instead I calculated a few old recipes ... the quantities of ingredient that need to be mixed."

'How boring is maths time ... but how boring it is to spend your Saturdays like that," Johnny complained. 'I never understood what magic has to do with maths ..."

'Mr. Knudlac said that what helps us in difficult situations in life is knowledge. This ...