<< Previous Puzzle Saturday, April 30, 2011 Newer Puzzle >>

Telephone


The word telephone means 'far voice'. Alexander Graham Bell was the first to be awarded a patent for the telephone, in March 1876. However various inventors had been working at transmitting audio over wire.
See Also: http://en.wikipedia.org/wiki/Telephone

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<< Previous Puzzle Friday, April 29, 2011 Newer Puzzle >>

Australia


James Cook landed in Australia and named her so on April 29th 1770. But humans have habited Australia for at least 42,000 years, by what eventually evolved into the modern indigenous australian civilisation.
See Also: http://en.wikipedia.org/wiki/Australia

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<< Previous Puzzle Thursday, April 28, 2011 Newer Puzzle >>

Epoch


In astronomy, epoch is an unambiguous moment in time used for reference. So when you need to know what time it is, ask someone if they have the epoch.
See Also: http://en.wikipedia.org/wiki/Epoch_%28astronomy%29#Julian_years_and_J2000

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<< Previous Puzzle Wednesday, April 27, 2011 Newer Puzzle >>

Light-year


One light year is the distance that light travels in vacuum in 365 days and a quarter (one Julian Year). That is just under 10 trillion kilometers. That is one followed by 14 zeros kilometers. Yep. light is fast.
See Also: http://en.wikipedia.org/wiki/Light-year

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<< Previous Puzzle Tuesday, April 26, 2011 Newer Puzzle >>

Julian Year


A Julian year is an astronomical measure of time totalling 31,557,600 seconds, or 365.25 days of 86,400 seconds each. The symbol for a Julian Year is 'a'.
See Also: http://en.wikipedia.org/wiki/Julian_year_%28astronomy%29

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<< Previous Puzzle Monday, April 25, 2011 Newer Puzzle >>

DNA Double Helix


James Watson and Francis Crick described the double helix structure of the DNA, in a publication on journal Nature, 58 years ago today, on the 25th of April 1953, How far has DNA technology come since then!
See Also: http://en.wikipedia.org/wiki/Molecular_Structure_of_Nucleic_Acids:_A_Structure_for_Deoxyribose_Nucleic_Acid

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<< Previous Puzzle Sunday, April 24, 2011 Newer Puzzle >>

Happy Easter


Happy Easter to all Christian trace perfect puzzlers and not. Don't eat too many hot cross buns!
See Also: http://en.wikipedia.org/wiki/Easter

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<< Previous Puzzle Saturday, April 23, 2011 Newer Puzzle >>

Taurus


Taurus, latin for bull, is a large constellation prominent in the Northern Hemisphere. The brightest star of Taurus is the orange-hued Aldebaran, arabic for follower.
See Also: http://en.wikipedia.org/wiki/Taurus_%28constellation%29

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<< Previous Puzzle Friday, April 22, 2011 Newer Puzzle >>

Seventy Three


"The best number is 73. Why? 73 is the 21st prime number. Its mirror (37) is the 12th and its mirror (21) is the product of multiplying, hang on to your hats, 7 and 3. ... In binary, 73 is a palindrome, 1,0,0,1,0,0,1 which backwards is 1,0,0,1,0,0,1." - Dr Sheldon Cooper
See Also: http://en.wikipedia.org/wiki/73_%28number%29

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<< Previous Puzzle Thursday, April 21, 2011 Newer Puzzle >>

Nine Dots Puzzle


On a piece of paper, draw 9 dots in the shape of a square. The challenge is to trace through all of the 9 dots using just 4 straight lines, without lifting the pen from the paper. This is literally thinking outside the box. This trace perfect puzzle mimics the 9 dot puzzle. The lines are invisible until you traverse them. The lowest score solutions for today's trace perfect puzzle is one of the solutions to the 9 dots puzzle.
See Also: http://en.wikipedia.org/wiki/Thinking_outside_the_box

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<< Previous Puzzle Wednesday, April 20, 2011 Newer Puzzle >>

The Panther


The panther is not a real animal. The word 'panther' is generically used to refer to various species of large cats.
See Also: http://en.wikipedia.org/wiki/Panther

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<< Previous Puzzle Tuesday, April 19, 2011 Newer Puzzle >>

Figolli


Figolli are traditional Maltese Easter baked pastries that consist of an almond based filling between two sheets of sweet pastry and decorated colourfully with icing and/or chocolate. The typical shapes for figolli are rabbits, hens, fish, butterflies and love hearts. They are eaten on Easter morning, and are so yum they don't last long!
See Also: http://www.facebook.com/Figolli

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<< Previous Puzzle Monday, April 18, 2011 Newer Puzzle >>

Japanese Volcanoes


Japan has ten percent of all world's active volcanoes. For a reatively small group of islands, that is a lot.
See Also: http://www.volcanolive.com/japan.html

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<< Previous Puzzle Sunday, April 17, 2011 Newer Puzzle >>

Sternutation


Commonly know as a sneeze, sternutation can happen due to an immediate exposure to bright light, or due to a full stomach. The speed of an average sneese is 90 miles per hour.
See Also: http://en.wikipedia.org/wiki/Sneeze

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<< Previous Puzzle Saturday, April 16, 2011 Newer Puzzle >>

Last Lest List Lost Lust


Five four-letter words with just one vowel difference. Can think of more?

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<< Previous Puzzle Friday, April 15, 2011 Newer Puzzle >>

Euler's Bridges


Lenhard Euler was a Swiss mathematician of the 18th century, born 304 years ago today. By studying graph theory, he solved the problem of the seven bridges of Konigsberg, Prussia. This town had two islands in the middle of the river connected by 7 bridges. The challenge was to cross all bridges exactly once and return to the starting point.
See Also: http://en.wikipedia.org/wiki/Seven_Bridges_of_K%C3%B6nigsberg

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<< Previous Puzzle Thursday, April 14, 2011 Newer Puzzle >>

Travelling Salesman Problem


A salesman needs to visit towns as efficiently as possible. In computer science this is known as travelling salesman problem (TSP). Trace Perfect puzzles of this type are like the TSP, with just one difference. In classic TSP, you are supposed to end where you started from. This is not the case in the Trace Perfect puzzles.
See Also: http://en.wikipedia.org/wiki/Travelling_salesman_problem

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<< Previous Puzzle Wednesday, April 13, 2011 Newer Puzzle >>

Chinese Postman Problem


The Chinese Postman problem is a Mathematical problem also known as the Route Inspection Problem or the Postman Tour. This is because the goal is like for a postman to deliver the letters to every street in town. It was originally studied by Chinese Mathematician Mei-Ku Kuan in 1962. The normal tRace Perfect puzzle is based on the Chinese Postman Problem.
See Also: http://en.wikipedia.org/wiki/Route_inspection_problem

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<< Previous Puzzle Tuesday, April 12, 2011 Newer Puzzle >>

First man in Space


Yuri Gagarin was the first person to go to space, 50 years ago on 12 April 1961. He was on board Vostok 1. a Russian space capsule. What a feat?!
See Also: http://en.wikipedia.org/wiki/Vostok_1

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<< Previous Puzzle Monday, April 11, 2011 Newer Puzzle >>

Flying Mammals


Bats are not birds. They are mammals, the only mammals that can actually fly, not just glide. They are not really blind, but have very poor vision. Instead they emit sounds that echo against objects. They then pick up that echo to work out how to fly around. Humans cannot hear these ultrasonic sounds.
See Also: http://en.wikipedia.org/wiki/Bat

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<< Previous Puzzle Sunday, April 10, 2011 Newer Puzzle >>

Feel Better Twice


Everyday do one thing that makes you feel better, and one other thing that makes someone else feel better. That way you made yourself feel better twice.

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<< Previous Puzzle Saturday, April 9, 2011 Newer Puzzle >>

Popping Corn


Mostly know as Popcorn. Discovered thousands of years ago by Native Americans. Can be a cheap, quick, healthy, home-made snack. Buy it as unpopped kernels from the grocery. Put 1/4 cup in a paper bag. Fold the open edge of the bag three times tightly. Microwave until popping almost stops. Place in a bowl. Sprinkle a little bit of salt. And enjoy!
See Also: http://en.wikipedia.org/wiki/Popcorn

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<< Previous Puzzle Friday, April 8, 2011 Newer Puzzle >>

SNAFU; SUSFU!


Situation Normal, All Fouled Up... Situation Unchanged, Still Fouled Up! The acronyms have military origins.
See Also: http://en.wikipedia.org/wiki/SNAFU

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<< Previous Puzzle Thursday, April 7, 2011 Newer Puzzle >>

March 2011 Winner


The random winner for March is tonysammut. Instead of claiming the t-shirt, tonysammut nobly opted for tRace Perfect to donate $50 to the UNHCR Emergency Appeal on his behalf. Congratulations. Remember, the more you play, the more chance you have of winning the monthly prize.
See Also: http://www.traceperfect.com/p/trace-perfect-monthly-competition.html

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<< Previous Puzzle Wednesday, April 6, 2011 Newer Puzzle >>

Games of the I Olympiad


The first modern Olympic games were held in Athens in 1896, exactly 115 years ago today. The olympic rings were designed 16 years later by the founder, Pierre De Coubertin. They represent each of the 5 continents. Finish the puzzle to discover the colours.
See Also: http://en.wikipedia.org/wiki/1896_Summer_Olympics

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<< Previous Puzzle Tuesday, April 5, 2011 Newer Puzzle >>

Heaven


A little boy was brought back to life by doctors. Later he told his parents he met his sister who had died. The twist is that his parents had never told him about her, that she ever existed. Do you believe? The puzzle today is the chinese symbol for heaven.
See Also: http://www.youtube.com/watch?v=UYwC2-utH4A

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<< Previous Puzzle Monday, April 4, 2011 Newer Puzzle >>

Microsoft


Bill Gates cofounded Microsoft 36 years ago, on April 4th, 1975. The Windows computer operating system has been by far the most popular for personal use.
See Also: http://en.wikipedia.org/wiki/Microsoft

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<< Previous Puzzle Sunday, April 3, 2011 Newer Puzzle >>

Daylight Savings Time


I live in NSW, Australia. I slept for one extra hour last night. At 3am, the time went back to 2am to undo the daylight savings hour applied before summer started. So 3am actually struck twice. Countries in the northern hemisphere that observe daylight savings will be moving their clock one hour forward around this time of the year. Their summer is approaching!
See Also: http://en.wikipedia.org/wiki/Daylight_saving_time

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<< Previous Puzzle Saturday, April 2, 2011 Newer Puzzle >>

Monty Hall Paradox


You are asked to pick one of three doors, behind which only one of them is a prize. After you pick your door, a different door is opened that does not have the prize behind it. You are offered to change your choice to the other closed door. It seems absurd but it is proven that you have a better chance of picking the prize if you change your choice.
See Also: http://en.wikipedia.org/wiki/Monty_Hall_problem

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<< Previous Puzzle Friday, April 1, 2011 Newer Puzzle >>

The aliens have landed


April Fool has old but uncertain origins. Will you fall for any pranks today? The online media will certainly pull a few.
See Also: http://en.wikipedia.org/wiki/April_Fools%27_Day

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