Maths to the rescue

Dwight Barkley, a professor at Warwick University, has found the equation that predicts how soon your child will ask, "Are we there yet?" on a car trip.

In mathematical terms, the calculation reads: Q= (1+x) divided by y2 + z where Q is the question, x the number of on board activities, y the number of children and z the time taken to get the car loaded.

The full story in the Guardian.

(Sorry about the non-maths appearance of the equation...)