Chalkboard Pop Quiz Clock

Put your number skills to the test with the old-school Chalkboard Pop Quiz Clock. Styled like a traditional blackboard, this printed metal wall clock is emblazoned with tricky equations worthy of any mathematical whiz.

Thankfully, the answer to each baffling sum relates to where it sits on the clockface. So you’ll find minus-eight-equals-two-minus-X where you would normally find number ten. And so on. Talk about maths made easy!

A great gift for the wannabe number-cruncher in your life, the Chalkboard Pop Quiz Clock lets you tell time in the square root of a jiffy.