Brain Teasers User Profile

Rutu Raj

See full ranking list
short ranking list
9. Vladimir Krnac 3952
10. Manguexa Wagle 3755
11. Rutu Raj 3334
12. Nasrin 24 T 3242
13. NĂ­lton CorrĂȘa De Sousa 3213
last 3 solved tasks
If 431ac - 1ba58 = ab8ba find number abc. Multiple solutions may exist.
If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist.
The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C.

Friedrich Konrad Beilstein

Born 17 Feb 1838; died 18 Oct 1906 at age 68.Russian chemist whose research in organic chemistry included studying isomeric benezene derivatives. His lasting legacy, though, was starting the systematical description of organic compoounds, which he compliled in the publication of his Handbuch der organischen Chemie, (1880-82; Handbook of Organic Chemistry). He aimed that it should be a complete catalog, and already in its first edition, the two volumes described 15,000 compounds. As organic chemistry continued to grow rapidly, he published expanded second and third editions. After Beilstein's death, because of its great value to organic chemists, work on updating the publication was taken on by the Deutsche Chemische Gesellschanft, which.has continued to publish it.«

A kindergarten teacher handed...

A kindergarten teacher handed out a coloring page to her class. On it was a picture of a duck holding an umbrella. The teacher told her class to color the duck in yellow and the umbrella green, however, Bobby, the class rebel, colored the duck in a bright fire truck red. After seeing this, the teacher asked him: "Bobby, how many times have you see a red duck?" Young Bobby replied with "The same number of times I've seen a duck holding an umbrella."
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.