Archive for the 'Maths riddles' Category

Ocean’s Thirteen Riddle

Tuesday, July 3rd, 2007

picture courtesy of data-allocine.blogomaniac.fr 

In  the movie Ocean’s 13 Al Pacino is trying to open a new, huge, ultra fancy hotel. It has one hundred exclusive rooms with yacuzzi’s, massagechairs, you name it, and every door is painstakingly handpainted by Salvatore, a Portuguese tiling artist who has been specially flown in for the job. The guy is kinda quirky and apart from a huge fee he charges  500 bucks  extra for every nine he has to paint. How many nines does Salvatore have to paint and how much extra does he make? (more…)

Maths Riddle: Take away

Wednesday, May 30th, 2007

picture courtesy of iconceptbiz.com

I know this word,
and it has six letters,
take one away,
and twelve remains.

Who am I?? (more…)

Two Riddle

Tuesday, February 6th, 2007

picture courtesy of vandenhul.com

(another riddle would be what the hell this is a picture of! ;) )

When can you add two to eleven and get one as the correct answer? (more…)

Betting Riddle

Sunday, February 4th, 2007

picture courtesy of casial.net

If someone says to you, “I’ll bet you $1 that if you give me $2, I will give you $3 in return”, would this be a good bet for you to accept? (more…)

Double Riddle

Saturday, February 3rd, 2007


picture courtesy of nuance.org.ua

Double my number, I’m less than a score,
Half of my number is less than four.
Add one to my double when bakers are near,
Days of the week are still greater, I fear.

What am I? (more…)

Tuesday, January 30th, 2007

picture courtesy of birdsofsanibel.free.fr

It’s always 1 to 6,
it’s always 15 to 20,
it’s always 5,
but it’s never 21,
unless it’s flying.

(more…)

Robber Riddle

Sunday, January 21st, 2007

picture courtesy of teatropanama.com

A robber decides to rob a castle, disguised as a musician. First he hides in the bushes, because he still has to find out the password needed to get in. Just as he’s crawling behind a tree he sees a knight approaching the gatekeeper. .

“What’s chasing you, Aldus?” The gatekeeper cries out’ ‘I don’t have time for your games, just say it’ the knight says, panting. The gatekeeper says ‘Twelve’ whereupon the knight anwers ’six’. The gatekeeper smiles, opens the gate and lets the knight in.

‘Aha. The robber thinks. I think I have to say half of the sum the gatekeeper says. I’m almost sure that’s it, but I’ll wait for a bit just to make sure.’ The robber sits tight until an old lady approaches the gate.

Hello Anna, good to see you!” The gatekeeper calls out. “Any good eggs in your basket today?”
Lots of them” the old lady says. “And none of them for you today, so give it to me.” The gatekeeper chuckles and says “Six”. The old lady answers “three” and the gate opens up.

The robber’s completely sure now and gets from behind his tree. He walks up to the guard, who eyes him suspiciously. “State your business, stranger!” he shouts. “I am a travelling minstrel”, the robber claims,”And I have come to entertain your lord”. “Do you know the password?” the guard asks the robber. “Of course.” The robber says. “Okay… Eight”, the guard says. “Four” the robber answers. The guard looks at him and calls out “Soldiers, come quick, this man is an impostor.” The robber is apprehended and thrown in the dungeon.

What should the robber have answered ? (more…)

Oranges Riddle, part II

Saturday, January 20th, 2007

Picture courtesy of polliesposse.net

For all of you who thought the previous Oranges Riddle was WAAAAAAAY too easy, here’s something to get your teeth into:

You still have the same 120 oranges, and those three orange bins. But now each bin can hold 60 oranges. You must put all of the oranges in the bins. Once this is done, you will write the number of oranges in each bin on its lid.

You can choose to leave one of the bins empty.

Now how many different arrangements of numbers on the lids are possible? (might wanna get out a calculator ;) , I sure needed one! ) (more…)

Oranges Riddle, part I

Friday, January 19th, 2007

Picture courtesy of thugsatbay.com


You have 120 oranges, and three orange bins. Each bin can hold 40 oranges. You must put all of the oranges in the bins. Once this is done, you will write the number of oranges in each bin on its lid.

How many different arrangements of numbers on the lids are possible? (more…)

Canterbury Tales Riddle

Thursday, January 18th, 2007

Picture courtesy of timetravel-britain.com

Four pilgrims were on the road to Canterbury. Their names, in no particular order, were John, Geoffrey, Martin, and Stephen. This is the conversation they had on the road:

John: “I usually only tithe two pence, but if I beat Stephen to Canterbury, I’ll gladly tithe double!”
Martin: “If I get to Canterbury first, I shall show my gratitude by tithing six pence! If I don’t, I shall tithe 4 pence anyway.”
Stephen: “You wayward fools are tossed by the wind! No matter what happens before here and Canterbury, I shall tithe three pence only. Heaven forgive your false piety!”
Geoffrey: “Shut up, Stephen. I pledge three pence if I beat you to Canterbury, but nothing if I don’t. We’ll see who’s right!”

Everybody was true to his word, and a total of thirteen pence was tithed at Canterbury. In what order did the pilgrims arrive?

FYI: for all of you who think “what the … is a tithe? A tithe (from Old English teogoþa “tenth”) is a one-tenth part of something, paid as a (usually) voluntary contribution or as a tax or levy, usually to support a Jewish or Christian religious organization. (more info on this is here) (more…)