#13 Snail party
Sam has four pet snails. She puts one of them at each corner of a square ABCD with sides 2 metres long. Being very friendly, each snail moves towards its neighbour, snail A to snail B, B to C, and so on, at all times pointing directly towards that neighbour. If each snail moves at a constant speed of 2 metres per hour, how long will it be before they meet?
Answer next week
#11 Lunar years
Solution
When I am 60, my sister on the moon will have just celebrated her 31st birthday.
The moon has…
