BRAIN TEASERS
Brain Teasers User Profile

saber zafarpoor

rank
111
points
34
See full ranking list
short ranking list
109. Watermelon Cat 35
110. Tôn Thất Minh Nhật 35
111. saber zafarpoor 34
112. HOPE ABARANWOLU 34
113. Lidija Duvnjak 33
last 3 solved tasks
If 2+3=10, 8+4=96, 7+2=63, 6+5=66 then 9+5=?
The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Electric cable car

In 1884, the first electrically propelled street-car line in the U.S. was begun in direct competition with horse-cars at Cleveland, Ohio, on the Bentley-Knight system. In the same year, the first practical system in the U.S. of conveying electricity from overhead wires to a motor on the car by a trolley, or small groved pulley on the end of a flexible pole extending above the roof of the car, was made in Kansas City, Mo. Improvements in the apparatus made by Sprague in 1888 led to the first American installation of a large scale electrically propelled street-car system at Richmond, Va. The earliest commercially successful application of electricity to the traction of street-cars was made at Lichterfelde, near Berlin, by Siemens and Halske in 1881.«*[Vol VII, p.776]

Double negative

A linguistics professor was lecturing to his class one day. "In English," he said, "a double negative forms a positive. In some languages though, such as Russian, a double negative is still a negative."

"However," he pointed out, "there is no language wherein a double positive can form a negative."

A voice from the back of the room piped up, "Yeah. Right."

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.