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What number comes next?

Look at the series (2, 3, 6, 21, 231), determine the pattern, and find the value of the next number!

Correct answers: 56

The first user who solved this task is Slobodan Strelac.

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Two Mongooses

A zookeeper is ordering new animals. As he fills out the forms, he types “two mongeese”. That doesn’t look quite right, so he tries two mongoose, and then two mongooses.
Giving up, he types, “One mongoose, and while you’re at it, send another one.”

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David Douglas

Died 12 Jul 1834 at age 35 (born 25 Jun 1799). Scottish botanist who was one of the most successful of the great 19th century plant collectors. He established about 240 species of plants in Britain. His first foreign plant-hunting expedition (1824) was made throughout the Pacific Northwest of the U.S. The Douglas fir, which he cultivated from 1827, is named after him. He introduced other conifers including the Sitka spruce, now commercially important to the timber industry, and numerous garden plants and shrubs, including the lupin, California poppy and the flowering currant. At age 35, he died in by accident in Hawaii, when he fell into a pit dug by the islanders to trap wild cattle where he was trapped with a bull that also fell into the pit. He was gored to death by the bull.«

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