If you are planning to cook rack of lamb, it’s best to get your maths right before you go out to the shops. It is not difficult. There are eight chops on each rack. If there are less, it is either rack of (insert other animal name here) or somebody has been scoffing what is rightfully yours. If there are more than eight then it is rack of (insert name of animal that lives near a leaky nuclear power plant here). The maths problem comes about because rack of lamb is a “three chops each” dish.