BRAIN TEASERS
Brain Teasers User Profile

Rutu Raj

rank
11
points
3208
See full ranking list
short ranking list
9. H Tav 3642
10. Vladimir Krnac 3558
11. Rutu Raj 3208
12. Sanja Šabović 3068
13. Eugenio G. F. de Kereki 2505
last 3 solved tasks
If 21a4c + c10c2 = b2a7b find number abc. Multiple solutions may exist.
NUMBERMANIA: Calculate the number 914 using numbers [1, 5, 9, 5, 82, 544] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
If 8c4aa - ab553 = 2b9c3 find number abc. Multiple solutions may exist.

Casein fibre

In 1938, the first U.S. patent was issued for casein fibre (No. 2,140,274). Earl Ovando Whittier and Stephen Philip Gould of Washington, D.C. had first produced casein fibre in December 1935. They dedicated the patent "to the free use of the people of the United States of America." Casein is the main protein found in milk. Their invention was to produce dispersions of casein (mixed usually with plasticizers and salts), to be extruded into fibres having the requisite characteristics of strength, water resistance, flexibility, and softness necessary to make them suitable as substitutes for wool and other fibres. Some of the best plasticizers suggested were the fat acids to give the fibres flexibility, softness and water repellancy. Sodium aluminate improved the fibre's strength.

Senior Citizen

A man visits his psychiatrist and talks about being haunted by visions of his departed relatives. He says; these ghosts are perched on the tops of fence posts around my garden every night. They sit there and watch me and watch me. What can I do?

The psychiatrist says; that's easy … just sharpen the tops of the posts.
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.