Brain Teasers User Profile

Mita Kojd

See full ranking list
short ranking list
1. Djordje Timotijevic 4455
2. Mita Kojd 4432
3. Thinh Ddh 4427
4. Alfa Omega 4256
5. Fazil Hashim 4197
last 3 solved tasks
Remove 7 letters from this sequence (DQEMOAGRCBAIZPHYA) to reveal a familiar English word.
Remove 5 letters from this sequence (CLEARNKIVLMNG) to reveal a familiar English word.
If 554a6 - 351aa = 2c2ab find number abc. Multiple solutions may exist.


In 1938, xerography was demonstrated by Chester F. Carlson. With his assistant, Otto Kornei, Carlson used a sulphur coating on a zinc plate, vigorously rubbed with a handkerchief to apply an electrostatic charge. A glass slide was prepared using India ink to write "10-22-38 ASTORIA," then laid on the sulphur surface in a darkened room. After illuminating them with a bright incandescent lamp for a few seconds, the slide was removed. When lycopodium powder was sprinkled on the sulphur surface and blown off, there remained a near-perfect image of the writing. Permanent copies were made by transferring the powder images to wax paper and heating the sheets to melt the wax. Xerox is a term coming from "xerography" which means dry writing and is a trademark.

A lot of problems

A lot of problems in the world would disappear if we would talk to each other instead of about each other!
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.