All entries for October 2009
October 26, 2009
Elephants always wear pink trousers.
Every creature that eats honey can play the bagpipes.
Anything that is easy to swallow eats honey.
No creature that wears pink trousers can play the bagpipes.
Therefore: Elephants are easy to swallow.
Is the deduction correct or not?
October 19, 2009
The number 153 is equal to the sum of the cubes of its digits:
13 + 53 + 33 = 1 + 125 + 27 = 153
There are three other 3-digit numbers with the same property, excluding numbers like 001 with a leading zero.
Can you find them?
October 12, 2009
According to a puzzle book published in the Middle Ages, the statue of the goddess Pallas Athene was inscribed with the following information:
“I, Pallas, am made from the purest gold, donated by five generous poets. Kariseus gave half; Thespian an eighth. Solon gave one-tenth; Themison gave one-twentieth. And the remaining nine talents’ worth of gold was provided by the good Aristodokos.”
How much did the statue cost in total? [A talent is a unit of weight, roughly one kilogram.]
October 05, 2009
The Warwick Maths Challenges are based on the books of Professor Ian Stewart.
Prof Stewart’s latest book – Hoard of Mathematical Treasures – is out now and we will bring you some of the best challenges and brain teasers every Monday morning.