Richard Wiseman's Blog, page 19

Woman drinks huge glass of wine

fotoflex sent me this rather lovely image who is about to have the mother all of hangovers….

Answer to the Friday Puzzle….

On Friday I posted this puzzle.

I have a 100 pound watermelon laying out in the sun. 99% of the watermelon’s weight is water. After a few hours 98% of the watermelon’s weight is water. How much water evaporated?

If you have not tried to solve it, have a go now.  For everyone else the answer is after the break.

The answer is 50 pounds – but can you explain why?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

It’s the Friday Puzzle!

Please do NOT post your answer, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.

I have a 100 pound watermelon laying out in the sun. 99% of the watermelon’s weight is water. After a few hours 98% of the watermelon’s weight is water. How much water evaporated?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

Giant squirrel!

The ever wonderful @jbrownridge sent me this lovely image of a huge giant squirrel….

The boy with the world’s longest arm

First, I would love it if you could find a couple of minutes to take part in my new project exploring the psychology of sleeping positions.  All you have to do is click here. Much appreciated.

Second, @elsie_em sent me this great photograph of a boy with the world’s longest arm!

The mystery of the vanishing horse

Bill T brought my attention to this lovely little magic video.  Enjoy the mystery of the vanishing horse….

Answer to the Friday Puzzle…

On Friday I posted this puzzle….

My friend has 4 pieces of jewelry – a ring, a necklace, a bracelet and a brooch.  Given that she can wear any number of the objects when she goes out, how many combinations of her jewelry does she have to choose from?

If you have not tried to solve it, have a go now.  For everyone else, the answer is after the break.

She can wear 4 combinations of 1 piece, 6 of 2, 4 of 3, and 1 of 4 – making 15 different combinations in all.  Did you solve it?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

It’s the Friday Puzzle!

First, we have just released some new research showing that millions of people in the UK are now sleep deprived.  If you want to discover if you need more sleep, we have created The Sleep Test.  Hope you find it interesting.

Second, here is the puzzle. Please do NOT post your answer, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.

My friend has 4 pieces of jewelry – a ring, a necklace, a bracelet and a brooch.  Given that she can wear any number of the objects when she goes out, how many combinations of her jewelry does she have to choose from?

 

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

10 Amazing tips to improve your sleep

I have just posted a new sleep-based Quirkology video, containing 10 top tips and some amazingly expensive stop motion animation. Enjoy.

Amazing non existent 3d pedestrian crossing!

@yalbader sent me this great photo of an optical illusion pedestrian crossing in Kyrgyzstan – what a fab idea!