What time do you think it is with the Graph Paper Pop Quiz Clock if mathematics isn’t your forte? Confound the receiver of this gift as they use their brains to figure out just the current time, since fractions and other mathematical equations are seemingly penciled into what looks like graph paper. This isn’t going to be cheap by any means though at £29.99 a pop, and those who are up to speed will definitely find a much easier way to tell the time.