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Ma C Ky

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last 3 solved tasks
What is the next number in the sequence 1, 2, 6, 42, 1806, ? (author: Brain Teasers & Riddles)
If 7ab0c - a877b = 5ca24 find number abc. Multiple solutions may exist.
How many squares do you see?

Wolfgang Ostwald

Born 27 May 1883; died 22 Nov 1943 at age 60.German chemist who devoted his life as a teacher, researcher, editor and one of the founders of colloid chemistry. He defined colloids as disperse systems that are generally polyphasic and that possess particles 1-100 millimicrons in size. He discovered the rule of colour dispersion in the optics of colloidal systems, explained colloids' irregular flow behaviour, textural viscosity, and textural turbulence, and developed a method of foam analysis. He edited (from 1909) Kolloidchemische Beihefte and other journals and as the founder (1922) and president of the Kolloid Gesellschaft, Ostwald advanced research in colloids. He was the second child of 1909 Nobel Laureate Friedrich Wilhelm Ostwald.

Little Johnny's kindergarten c...

Little Johnny's kindergarten class was on a field trip to their local police station where they saw pictures tacked to a bulletin board of the 10 most wanted criminals. One of the youngsters pointed to a picture and asked if it really was the photo of a wanted person. 'Yes,' said the policeman. 'The detectives want very badly to capture him.
'Little Johnny asked, 'Why didn't you keep him when you took his picture?’
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