The Pharoah asked: “Who is the greatest of the gods?” ‘I am not” said Horus. “Anubis is” said Isis. “Isis is lying”, said Anubis. Only one god was telling the truth, the other two were lying. Who is the greatest?

A mute person goes into a shop and wants to buy a toothbrush. By imitating the action of brushing his teeth he successfully expresses himself to the shopkeeper and the purchase is completed. Next, a blind man comes into the shop who wants to buy a pair of sunglasses; how does he indicate what he wants?

There is a barrel with no lid and some water in it. “This barrel is more than half full,” said Tom. “No it’s not,” say John. “It’s less than half full.” Without any measuring implements and without removing any water from the barrel, how can they easily determine who is correct?

Every day, a man crosses the border of Mexico on a bicycle with two bags of sand. The custom officers check his bags and they are full of sand. The custom officers are aware that he is smuggling something but are not sure what is it exactly. As they do not have any evidence, they let him cross the border. What is he smuggling?

There is a bottle recycling bin, with one lonely bottle inside. Every hour, on the hour, people come and put bottles into the skip. The first hour, at noon, one person came and put a bottle in. One hour later, two people placed a bottle each into the skip. An hour later four people placed a bottle each into the skip. This doubling of people continued until 11pm, when the bin was finally full. When was the bin exactly half full?

A man was working on a night shift when he suddenly received a telephone call giving him some information causing him to dash home at breakneck speed. On bursting into his bedroom quite breathless he found his informant was quite correct and his wife was in bed with someone he had never even clapped eyes on before. However, far from being angry he greeted them both with a friendly smile and a few hours later was bringing them both breakfast in bed. What is the reason for this?

In a cave there is a treasure within a big metal box with a lock on it. There is also a monster in the cave that has two keys with him; one gold and the other silver. The monster will give you only one chance to open the lock using one of the keys. If the box doesn’t open, the monster will kill you. Since the monster is a bit helpful it would give you a clue in finding out the correct key. Can you choose the correct key by deciphering the below clue? A GKOY OEPD LYEO DCNO EAAR NNN

At the scene of a heinous crime, five suspects, one of whom is the guilty party, are being interrogated by a detective. Each of the suspects gives one statement and it later transpires that just three of these statements are correct. These are the statements: Uncle Jack: Uncle Jim committed the murder Aunt Mary: I did not do it Cousin Stewart: It was not Cousin Margaret Uncle Jim: Uncle Jack is lying when he says I did it Cousin Margaret: Aunt Mary is telling the truth Who committed the murder?

You have three boxes. One has only red marbles, one has only blue marbles and the third has an equal number of red and blue marbles. The labels on the boxes have intentionally been switched so that each box is now marked incorrectly. Your job is to relabel the boxes correctly. Of course you could just look in the boxes to find out which labels match, but can you do it without looking into each box? Reach into any one of the boxes and select one marble. Can you now correctly label all three boxes? If not, select a second marble from any box. What is the fewest number of marbles you need to inspect in order to correctly label each box?

Once upon a time there was a beautiful princess named Anna. Anna’s father, the King, wanted to be sure his daughter married an intelligent man. To test his daughter’s suitors the King hid Anna’s picture in one of three boxes. The suitor had to be able to select the box with Anna’s picture on one try and within twenty seconds. On the gold box was the message, “Anna’s picture is in this box”. The silver box had the message, “Anna’s picture is not in this box.” “Anna’s picture is not in the gold box” was written on the bronze box. The King would tell each suitor, “Only one of the three messages is correct.” Which box contained Anna’s picture?

Lucretia Borgia invited a prospective victim to lunch. They ate a hearty meal of roast venison, with a selection of fresh vegetables, all washed down with the finest wine imported from Bordeaux in France. After the meal they finished off with figs and grapes freshly picked. “Just one apple left”, said Lucretia, “I insist you have that. “No”, said the guest, “I couldn’t”. “Tell you what”, said Lucretia, “we will share it”, and promptly sliced it neatly in two with her sharpest knife. The guest and Lucretia started to eat their respective halves when suddenly the guest’s eyes rolled towards the ceiling and he keeled over backwards stone dead. “Another victim successfully despatched,” thought Lucretia. Why was Lucretia not poisoned after eating the apple?