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Archive for the ‘Math Puzzles’ category


Wine & Beer Puzzle

December 27th, 2007

An Innkeeper purchased an odd number of wine kegs, and one keg of beer. These are shown in the picture above. The Innkeeper then sold an amount of the wine to one woman and twice this amount to another, but kept the beer to herself.

Can you figure out which keg contains the beer? (the kegs were sold just as they were purchased, without manipulating the contents)

[answers can be submitted below in the comments section if you can figure it out. To give everyone a fair chance, however, will keep submissions under wraps for about 2 days. Thanks]

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The Missing Number

December 19th, 2007

Can you figure out what the missing number is?

for this math puzzle, will unmask any submitted answers in a day or 2.

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Teeter-Totter Balance Puzzle

December 5th, 2007

A girl wanted to play on the seesaw. However, she couldn’t find another child to play with her, so she tied some books to one end of the plank to balance her weight at the other.

She just balanced against 16 books, when these were fixed to the short end of the plank, but if she fixed them to the long end of the plank, she only needed 11 as balance.

Now, what was the girl’s weight, if a book weighs equal to a three-quarter book and three-quarters of a pound? (Assume all books are uniform and weigh the same)

 

[submitted answers to show 1-2 days)

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Unique Window

November 25th, 2007

window puzzle

How can a window, having a height equal to its width, be made twice as large without increasing its height or width?

(will unmask any submitted answers to this puzzle in 24-48 hrs, thanks)

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Egg Basket math puzzle

November 12th, 2007

egg basket math puzzle

Two children went to town to sell their eggs, one had more in her basket than the other; the one who had the most said to the other, “Give me one of your eggs, and then I shall have double the number you have.”-”No”, said the other; “give me one of yours, and then we shall have equal”.

How many eggs had each of these children?

(answers to show in 1-2 days)

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Nuts

October 20th, 2007

Math nut cracker brain teaser

ok, for those who thought the last couple brain teasers were too easy, let’s kick it up a notch :)

When asked how many nuts he had in his basket, a boy replied that when he counted them over 2 by 2, 3 by 3, 4 by 4, 5 by 5, or 6 by 6, there was 1 remaining; when he counted them by 7s there was no remainder. How many had he?

will post submitted solutions Monday, thanks

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Green Ball Number Teaser

October 18th, 2007

green ball math sequence brain teaser

Can you figure out the missing number?

(will show submitted answers sometime this weekend)

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A Glorious Game

October 9th, 2007

football brain teaser

Here’s a classic brain teaser: “At the close of last season, of the footballers of my acquaintance four had broken their left arm, five had broken their right arm, two had the right arm sound, and three had sound left arms.”

Can you discover from that statement what is the smallest number of players that the speaker could be acquainted with?

answers to be revealed in 2 days.

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Green Number Grid

October 9th, 2007

Can you figure out what numbers should fill the empty squares?

green box number puzzle

will reveal answers in 1-2 days, thanks.

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Egg basket math problem

October 1st, 2007

basket egg math puzzle

A child has a basket containing 150 eggs. For every 1 1/2 goose eggs in her basket she has 2 1/2 duck’s eggs and 3 1/2 hen’s eggs. How many of each kind has she?

Submitted answers to show in 2 days, thanks.

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Find the Missing Number

September 30th, 2007

For this problem, can you figure out what the missing number is?

missing number puzzle

will reveal submitted answers in 1-2 days.

Have a couple more puzzles to post in the next 12-24 hrs…

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Ancient coin arrangement puzzle

September 24th, 2007

For this puzzle, arrange the 12 ancient coins in six rows, with four coins in each row.

Click on image below to play the puzzle in flash.

ancient coin puzzle

There are two winning configurations that I know of; will reveal submitted answers in a day or 2.

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‘Math by Two’ Problem

September 8th, 2007

 

Required to divide 45 into four parts, so that the first part with two added, the second with two subtracted, the third divided by two, the fourth multiplied by two, shall equal each other.

[Answers to show Monday]

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Balance the Scale Picture Puzzle

September 6th, 2007

How many yellow hearts are needed to balance scale #3?

 

hope this doesn’t turn out to be as difficult as the last scale balancing puzzle we posted

 

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Marriage Age Brain Teaser

August 21st, 2007

Here’s a slightly modified version of an old brain teaser:

James: "Do you know, when the Jacksons married 18 years ago, Mr. Jackson was three times as old as his wife, and today he is just twice as old as she?"

Shirley: "Then how old was Mrs. Jackson on the wedding day?"

Can you answer Shirley’s question?

Was scrolling through the post archives, and came across this neat bit of info: How falling in love improves your brain.

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