BRAIN TEASERS
Brain Teasers User Profile

Dejan Mratinkovic

rank
403
points
1
See full ranking list
short ranking list
401. Craig Johnson 1
402. Rohit Chauhan 1
403. Dejan Mratinkovic 1
404. Petar Petrovic 1
405. Brenda McCain Swann 1
last 3 solved tasks
Find the area of the shaded region accurate up to 3 decimal places. (A=?, r=1389)

Edison patent

In 1901, Thomas A. Edison was issued patents for a "Magnetic Separator" and an "Apparatus for Screening Pulverized Material" (U.S. Nos. 675,056 and -7), two of several patents for which he applied in mid-1897 concerned with "a Method of breaking rock", rolls, a conveyor, drying apparatus, mixer, and "Lubricating Journal-Bearings." The patent diagram (left) shows a magnet at the centre separating falling streams of magnetic and non-magnetic materials.

Patient and Doctor

Patient: "Doctor, Doctor... I can't stop stealing things".
Doctor: "Take these pills for a week. If that doesn't work, I'll have a color TV".
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.