BRAIN TEASERS
Brain Teasers User Profile

Rutu Raj

rank
11
points
3334
See full ranking list
short ranking list
9. Vladimir Krnac 3952
10. Manguexa Wagle 3755
11. Rutu Raj 3334
12. Nasrin 24 T 3289
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.

Dry-cell patent

In 1886, German scientist, Dr. Carl Gassner, was issued a German patent (No. 37,758) for the first "dry" cell, which used zinc as its primary ingredient. He encased the cell chemicals in a sealed zinc container. Gassner's battery was much like the carbon-zinc, general-purpose batteries on the market today. Gassner also patented his invention in Austria, Belgium, England, France and Hungary in the same year. A U.S. patent was issued to Gassner in 1887 (No. 373,064) on 15 Nov 1887. In America, by 1896, the Nation Carbide Company, later Union Carbide and Eveready, produced the first consumer dry cell battery. Two years later, the company made the first D cell. Combined with the invention of incandescent light bulbs, portable electric lights became common.«[Image: The six-inch, 1.5 volt Columbia Dry Cell marketed by NCC in 1896.]

Love with a beautiful blonde

I was in love with a beautiful blonde once, dear. She drove me to drink. That's the one thing I'm so indebted to her for.

WC Fields (1880-1946)

Picture: Perseus Book Group

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.