Puzzle 153
At the equator the radius of the earth is 6,378 km, so its circumference is almost exactly 40,000 km.
Imagine we had a long rope which went around the equator, this would of course be 40,000 km long.
If we now placed 1 metre sticks vertically all the way around and lay the rope on top of these sticks (so the rope would be 1m higher all the way around) how much extra rope would we require?
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Puzzle 154
Which one of these sentences is the odd one out? The answer is nothing to do with food or animals.
Jackals are mean, eager scavengers.
Koalas eat in the heat.
Sheep invariably munch old newspapers.
Seals are rare and hungry.
Foxes rich appetite never kicks.
Puzzle Copyright © Kevin Stone
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Puzzle 155
The local CD shop operates an unusual discount policy. The discount on the next purchase is worked out on the current purchase in the following way: for every whole pound spent you get 0.5% discount on the next purchase. For example, if you purchased £8.99 on the first purchase, you would then get a 4% discount on the next purchase and so on. You can make as many purchases as necessary.
You need to buy 7 CDs, costing, £11.50, £12.00, £12.00, £12.50, £13.00, £13.00 and £14.50. What is the cheapest method of buying them?
Puzzle Copyright © Kevin Stone
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