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aysan saidie

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last 3 solved tasks
If 8638+7542=664 and 5589+2468=872 then 1357+1919=?
If 5+7+2=68, 8+6+1=48 and 3+4+5=58 then 7+3+4=?
MATH PUZZLE: Can you replace the question mark with a number?

John Howard Northrop

Died 27 May 1987 at age 95 (born 5 Jul 1891).American biochemist who received (with James B. Sumner and Wendell M. Stanley) the Nobel Prize for Chemistry in 1946 for successfully purifying and crystallizing certain enzymes, thus enabling him to determine their chemical nature. During WW I, he conducted research on fermentation processes suitable for the industrial production of acetone and ethyl alcohol. This work led to a study of enzymes essential for digestion, respiration, and general life processes. He crystallized pepsin (1930), a digestive enzyme present in gastric juice, and found that it is a protein, thus resolving the dispute over the nature of enzymes. Using the same chemical methods, he isolated the first bacterial virus (bacteriophage), and found it is a nucleoprotein (1938).

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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