Brain Teasers User Profile

nilton sousa

See full ranking list
short ranking list
50. femcosec Yan 372
51. Girish Shivanand 359
52. nilton sousa 308
53. Meryl de la Rey 267
54. Marjan Kelemen 257
last 3 solved tasks
MATH PUZZLE: Can you replace the question mark with a number?
Find the title of novel, using the move of a chess knight. First letter is L. Length of words in solution: 2,12.
If ba9aa - 70b05 = cacac find number abc. Multiple solutions may exist.

Californium coal monitor

In 1969, the use of californium-252 radioactive material in monitoring the sulphur content of coal was announced by the Atomic Energy Commission. Using this intense neutron source to measure the sulphur content of coal, as it moved on a conveyor belt through a coal processing plant, would enable better control of the air pollution caused by burning coal. When coal is burned, for example at electrical power plants, its sulphur is released as sulphur dioxide, a pollutant which needs to be reduced, because it contributes to acid rain. In turn, this results in acidified soils, forest damage and building corrosion. A shipment of 18 micrograms of the isotope had been sent from its Savannah River plant to South Carolina to the Bureau of Mines research centre at Morgantown, West Virginia. (A microgram is one millionth of a gram.)«

A tourist in Vienna goes throu...

A tourist in Vienna goes through a graveyard and all of a sudden he hears some music. No one is around, so he starts searching for the source.
He finally locates the origin and finds it is coming from a grave with a headstone that reads: "Ludwig van Beethoven, 1770-1827."
Then he realizes that the music is the Ninth Symphony, and it is being played backward! Puzzled, he leaves the graveyard and persuades a friend to return with him. By the time they arrive back at the grave, the music has changed. This time it is the Seventh Symphony, but like the previous piece, it is being played backward. Curious, the men agree to consult a music scholar.
When they return with the expert, the Fifth Symphony is playing, again backward. The expert notices that the symphonies are being played in the reverse order in which they were composed, the 9th, then the 7th, then the 5th.
By the next day the word has spread and a throng has gathered around the grave. They are all listening to the Second Symphony being played backward.
Just then the graveyard's caretaker ambles up to the group. Someone in the group asks him if he has an explanation for the music.
"Don't you get it?" the caretaker says incredulously. "He's decomposing."
Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.