BRAIN TEASERS
Brain Teasers User Profile

Joni Allen

rank
318
points
6
See full ranking list
short ranking list
316. Timothy Cooper 6
317. Waheed Fawzy 6
318. Joni Allen 6
319. יוסף שעשוע 6
320. Thienphuc Gaming 6
last 3 solved tasks
Find 1 of 6 Words Hidden in the Picture.
There is an ancient invention still used in some parts of the world today that allows people to see through walls. What is it?
Remove 3 letters from this sequence (DHEAUTTING) to reveal a familiar English word.

Johan Gottlieb Gahn

Died 8 Dec 1818 at age 73 (born 19 Aug 1745).Swedish mineralogist and crystallographer who was born in an iron-ming town, and followed mining as a career. At the copper mine in Falun, he improved smelting methods and the use of by-products. He discovered manganese (1774), and also selenium. Gahn assisted his friend Carl Wilhelm Scheele (discoverer of chlorine) in finding phosphoric acid in bones. His limited published work included essays on the balance and use of the blowpipe as a convenient analytical tool. During the American Revolutionary War, one of his companies supplied copper for sheathing ships. Gahnite, a dark green to brown or black mineral, (ZnAl2O4), also called zinc spinel was named after Gahn.

There are three kinds of men...

There are three kinds of men: The ones that learn by reading. The few who learn by observation.
The rest of them have to pee on the electric fence for themselves.
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.