Brain Teasers User Profile

Michael Dela Torre Lascuña

See full ranking list
short ranking list
115. Chindu Cho 40
116. tony m. 39
117. Michael Dela Torre Lascuña 37
118. Tanesha Lindsey 37
119. Lidija Duvnjak 36
last 3 solved tasks
Perform this calculation in your head, mentally adding the numbers as quickly as you can. Start with 1000 and add 40. Now add 1000. Add 30 to that, then add another 1000. Now add 20 to that result. Add another 1000 and finally, add 10 to that. What is the total?
How many months during this year can have twenty eight days?
There are 6 words hidden in the picture, can you find 1 of 6?


In 1959, the maser was patented by Charles Townes (No. 2,879,439). "Maser" is an acronym for "Microwave Amplification by the Stimulated Emission of Radiation ". The invention is an apparatus for amplifying and producing electromagnetic energy directly from excited molecules or atoms. The concept grew out of research in microwave spectroscopy following Word War II . The image shows Townes with the second maser at Columbia University. The normally evaculated metal box where maser action occurs is opened up to show the four rods (centre) that send excited molecules into a resonant cavity (to the right). The microwaves that were generated emerged through the vertical copper waveguide near Townes' hand.

Sick Duck

A man took his old duck to the Doctor, concerned because the duck wouldn't eat.
The Doctor explained to the man that as ducks age their upper bills grow down over their lower bills and make it difficult for the animal to pick up it's food.
"What you need to do is gently file the upper bill down even with the lower bill. But you must be extra careful because the duck's nostrils are located in the upper bill and if you file down too far, when the duck takes a drink of water it'll drown."
The man goes about his business and about a week later the Doctor runs into his patient.
"Well, how is that duck of yours?" the Doctor inquires.
"He's dead." declared the heartbroken man.
"I told you not to file his upper bill down too far! He took a drink of water and drowned didn't he?" insisted the Doctor.
"No." lamented the man. "I think he was dead before I took him out of the vise."    

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.