Dr Who and his team have many important decisions to make and problems to work out on their voyages through space and time. How good are you at working out problems that don't always have a simple, obvious solution? Try these brain teasers:
1. The tide is rising. and you're sitting in a ship in the harbour. A rope ladder hangs over the side of the boat, its ends just touching the water. If the rungs of the rope ladder are one foot apart, and the tide rises at the rate of eight inches an hour, how many of the rungs will be covered after four hours?
2. How much earth is there in a hole two feet by two feet by two feet?
3. You've cooked a tasty pie for dinner. and all you have to do now is to cut it into eight pieces for your eight guests [part of the question is omitted - the answer makes it clear that you are only allowed three cuts of the pie]. How?
4. How could Dr Who stand behind Sarah and Sarah stand behind Dr Who - at the same time?
5. There are three apples in a basket and three people in a room. How can you give an apple to each person and still have one in the basket?
˙ʞɔɐq oʇ ʞɔɐq puɐʇs oʇ ǝʌɐɥ pןnoʍ ʎǝɥʇ ˙ᔭ
˙ןɐnbǝ ǝq oʇ ǝʌɐɥ ʇ,upıp sǝɔǝıd ǝɥʇ 'ɹǝqɯǝɯǝɹ ˙ssoɹɔɐ sʇnɔ oʍʇ uǝɥʇ 'ǝıd ǝɥʇ punoɹɐ ʇnɔ ɹɐןnɔɹıɔ ɐ ǝʞɐɯ ʇsɹıɟ ˙Ɛ
˙ǝןoɥ ɐ s,ʇı - ǝuou ˙Z
¡ǝpıʇ ǝɥʇ ɥʇıʍ sǝsıɹ ʇɐoq ǝɥʇ ǝsnɐɔǝq 'ǝuou ˙ן