BRAIN TEASERS
Brain Teasers User Profile

Roxana zavari

rank
9
points
2476
See full ranking list
short ranking list
7. Jakubovski Vladimir 3001
8. Vladimir Krnac 2553
9. Roxana zavari 2476
10. Rutu Raj 2436
11. Chandu Rajyaguru 2393
last 3 solved tasks
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.
Find the country and its capital city, using the move of a chess knight. First letter is L. Length of words in solution: 7,6.
Diophantus was a Greek mathematician who lived in the third century. He was one of the first mathematicians to use algebraic symbols. Most of what is known about Diophantus's life comes from an algebraic riddle from around the early sixth century. The riddle states: Diophantus's youth lasted one sixth of his life. He grew a beard after one twelfth more. After one seventh more of his life, he married. 5 years later, he and his wife had a son. The son lived exactly one half as long as his father, and Diophantus died four years after his son. How many years did Diophantus live?

Aleksandr Onufriyevich Kovalevsky

Died 22 Nov 1901 at age 61 (born 19 Nov 1840). Russian founder of comparative embryology and experimental histology, who first established that there was a common pattern in the embryological development of all multicellular animals. He studied the lancelet, a fish-shaped sea animal; about 2-in. (5-cm) long; then wrote Development of Amphioxus lanceolatus (1865). Then, in 1866, he demonstrated the similarity between Amphioxus and the larval stages of tunicates and established the chordate status of the tunicates. In 1867, Kovalevsky extended the germ layer concept of Christian Heinrich Pander and Karl Ernst von Baer to include the invertebrates, establishing an important embryologic unity in the animal kingdom. This was important evidence of the evolution of living organisms.a.k.a. Alexander Onufrievich Kovalevski. 19 Nov 1849 and 22 Nov 1901 (new style) are 7 Nov 1840 and 9 Nov 1901 (old style). Image: tunicate tadpole larva (L) and lancelet, Amphioxus (R).

“Look, Charlie,” the coach...

“Look, Charlie,” the coach said, “you know the principles of good sportsmanship. You know the Little League doesn’t allow temper tantrums, shouting at the umpire, or abusive language.” “Yes sir, I understand.” “Good, Charlie. Now, would you explain that to your father?”
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.