While you’re pondering on which coin to buy, have a go at these puzzles. The first is a simple warm up to get you ready for Einstein’s test! By the way, Einstein allegedly said that 98% of the population would not be able to work out “The Fish”. Which percentage band are you in??!!

The Tip

Three chaps in a hotel call room service and order two large pizzas. The delivery boy brings them up a bill for exactly £30.00. Each chap gives him a £10.00 note and he leaves. That's fact.

When he hands the £30.00 to the cashier, he is told that a mistake was made. The bill was only £25.00 not £30.00. The cashier gives the delivery boy five £1.00 coins and tells him to take them back to the three chaps who ordered the pizzas. That's fact.

On the way back to their room, the delivery boy has a thought. These chaps did not give him a tip. He figures that since there is no way to split the £5.00 evenly three ways, he will keep two pounds for himself and give them back three pounds. So far so good.

He knocks on the door and one fellow answers. He explains the mix up in the bill and hands the chap the three pound coins and then departs with his two pounds tip in his pocket. Now the fun begins!

Remember £30 - £25 = £5 Right? and £5 - £3 = £2 Right?

So, what's the problem? All is well, right? Not quite. Answer this: Each of the three chaps originally gave £10.00 each. They each got back £1.00 in change. That means that they paid £9.00 each, which, times three is £27.00. The delivery boy kept £2.00 for a tip. £27.00 plus £2.00 equals £29.00.

Where is the other pound???

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Einstein's Fish

Please note that there's only one solution for this riddle (not several)

1. There are five houses of five different colours.
2. In each house lives a person of a different nationality.
3. These five people drink different drinks, smoke different cigarette brands and have a particular pet.
4. None of them have the same animal, smoke the same brand or drink the same drink.

Question : Who has a fish?

Clues :

· The English lives in the red house.

· The Swede has dogs as pets.

· The Dane drinks tea.

· The green house is left of the white house.

· The owner of the green house drinks coffee.

· The person that smokes Pall Mall breeds birds.

· The owner of the yellow house smokes Dunhill.

· The person living in the house in the centre drinks milk.

· The Norwegian lives in the first house.

· The person that smokes Blends lives next to the person that has cats.

· The person that has horses lives next to the one that smokes Dunhill.

· The person that smokes Bluemaster drinks beer.

· The Italian smokes Prince.

· The Norwegian lives next to the blue house.

· The person that smokes Blends lives next to the one that drinks water.