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Smily Mohit

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MATH PUZZLE: Can you replace the question mark with a number?

Henry Chandler Cowles

Born 27 Feb 1869; died 12 Sep 1939 at age 70.American botanist who was a pioneer in the field of plant ecology, especially the concept of dynamic ecology, which he devised in the 1890's through a study of sand dune vegation at the southern end of Lake Michigan. He observed ecological succession, whereby starting with a bare habitat, there is a sequence of biological communities, each providing modification of the habitat to favour successors, until a climax community is established, characteristic of the climatic conditions of the region. His field work there showed that the vegetation at any one point in the system is related to the distance the point lies from the lake, the kind of soil present at the location, and the time period over which seeds and spores have had a chance to germinate.«

The teacher noticed that Johnn...

The teacher noticed that Johnny had been day dreaming for a long time. She decided to get his attention."Johnny," she said, "If the world is 25,000 miles around and eggs are sixty cents a dozen, how old am I? "Thirty-four," Johnny answered unhesitatingly.
The teacher replied "Well, that's not far from my actual age. Tell me...how did you guess?"
Oh, there's nothing to it," Johnny said. "My big sister is seventeen and she's only half-crazy."
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