The Royal Statistical Society has released its Christmas quiz for 2021, a set of 11 puzzles that require general knowledge, logic, lateral thinking, and searching skills, but no specialist mathematical knowledge.

Anyone may enter, individually or in teams of up to five. The top entry will receive £150 in Wiley book vouchers, second place £50 in book vouchers, and the next three entries a puzzle book or board game. And everyone who achieves a score of 50 percent or higher will win a donation to their favorite charity or good cause.

Entries must be received by 21:00 GMT on January 31. See the quiz web page for the rules and some tips for budding solvers.