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Find number abc

If 20b6c + a2a4c = 33aa4 find number abc. Multiple solutions may exist.

Correct answers: 29

The first user who solved this task is Nasrin 24 T.

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Little Johnny Goes Fishing

Little Johnny's father took him on a fishing trip to Canada.
On returning home after catching only three fish his father says, "The way I figure it each fish cost us $400!"
Little Johnny replied, "Well, at that price it’s a good thing we didn’t catch any more of them than we did."

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Karl Pearson

Died 27 Apr 1936 at age 79 (born 27 Mar 1857). English mathematician who was one of the founders of modern statistics. His lectures as professor of geometry evolved into The Grammar of Science (1892), his most widely read book and a classic in the philosophy of science. Stimulated by the evolutionary writings of Francis Galton and a personal friendship with Walter F.R. Weldon, Pearson became immersed in the problem of applying statistics to biological problems of heredity and evolution. The methods he developed are essential to every serious application of statistics. From 1893 to 1912 he wrote a series of 18 papers entitled Mathematical Contributions to the Theory of Evolution, which contained much of his most valuable work, including the chi-square test of statistical significance.

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