BRAIN TEASERS
Brain Teasers User Profile

wrath sas

rank
254
points
4
See full ranking list
short ranking list
252. Austin Tsui 4
253. Patrick Maher 4
254. wrath sas 4
255. Dick Hurtzbad 4
256. Jolana J 4
last 3 solved tasks
Which number should replace the question mark? Author: Sumbul Azeem
Which number should replace the question mark?
How much is 4x5?

Gilbert Newton Lewis

Died 23 Mar 1946 at age 70 (born 23 Oct 1875). American chemist who collaborated with Irving Langmuir in developing an atomic theory. He developed a theory of valency, which introduced the covalent bond (c. 1916), whereby a chemical combination is made between two atoms by the sharing of a pair of electrons, one contributed from each atom. This was part of his more general octet theory, published in Valence and the Structure of Atoms and Molecules (1923). Lewis visualized the electrons in an atom as being arranged in concentric cubes. The sharing of these electrons he illustrated in the Lewis dot diagrams familiar to chemistry students. He generalized the concept of acids and bases now known as Lewis acids and Lewis bases.«

Try To Get Some Rest

A man had been driving all night and by morning was still far from his destination. He decided to stop at the next city he came to, and park somewhere quiet so he could get an hour or two of sleep. As luck would have it, the quiet place he chose happened to be on one of the city's major jogging routes. No sooner had he settled back to snooze when there came a knocking on his window. He looked out and saw a jogger running in place.
"Yes?"
"Excuse me, sir," the jogger said, "do you have the time?" The man looked at the car clock and answered, "8:15". The jogger said thanks and left. The man settled back again, and was just dozing off when there was another knock on the window and another jogger.
"Excuse me, sir, do you have the time?"
"8:25!"
The jogger said thanks and left. Now the man could see other joggers passing by and he knew it was only a matter of time before another one disturbed him. To avoid the problem, he got out a pen and paper and put a sign in his window saying, "I do not know the time!" Once again he settled back to sleep. He was just dozing off when there was another knock on the window.
"Sir, sir? It's 8:45!."
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.