Here is a selection of the puzzles you've emailed.
Plane crash
A plane crashes on the border of France and Spain. Where are the survivors buried?
Answer Hayley Moss, Bury St Edmunds
How on earth?
How much earth is there in a hole 6.5m wide, 4m high and 3m deep? Answer
Ron Barrett, Lancashire
Flying train
Two trains are 200 miles apart and are running on the same track towards each other. One is travelling at 40mph, the other at 60mph. In between the two trains there is a fly travelling at 65mph. It first flies in one direction and finds there is a train coming towards it. It changes its direction and flies towards the other train. As it reaches the other train it changes direction and goes back again. In this way, the fly keeps oscillating between the two trains. How much distance does the fly cover before the trains crash and crush it? Answer
Avinash Chugh, Edinburgh
Answer
