BrainBashers - Random Puzzles

Puzzle 153

Every year, just before my birthday, I open my money box to see how much money I have saved.

Imagine my surprise when I found exactly £49.58 made up of equal numbers of 2p, 5p, 10p and 20p.

How many of each coin did I find?

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Puzzle 154

I started out on the journey from the forest with a full tank of fuel, 12 gallons exactly.

However, the moment I started out, the fuel tank sprung a leak. I travelled at 50 mph until I ran out of fuel exactly 4 hours later.

I know that the car does 25 miles for each gallon.

How much fuel had I lost through the hole?

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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?

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Puzzle 156

How many common five letter words can you make from the following letters, using all the letters in each word?
AELST

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