As an academic discipline, logic is the study of reasoning. Logic puzzles, therefore, involve solving problems by making a series of inferences and assessing these using reasoning. Sounds easy, right?

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

Powerball lottery drawings are at 11 pm ET every Monday, Wednesday and Saturday, including holidays. The winning $1.8 billion Powerball tickets were sold in Missouri and Texas. Each is worth $410.3 ...

Powerball lottery drawings are at 11 pm ET every Monday, Wednesday and Saturday, including holidays. The winning $1.8 billion Powerball tickets were sold in Missouri and Texas. Each is worth $410.3 ...

Powerball lottery drawings are at 11 pm ET every Monday, Wednesday and Saturday, including holidays. The winning $1.8 billion Powerball tickets were sold in Missouri and Texas. Each is worth $410.3 ...