Number Series Puzzle

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?




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Can you spot what's wrong with the following sentence?

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A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

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Which is the rope you never skip with?

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I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

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What number comes next in the series?

5 15 5 18 5 24 14 20 _

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Can you calculate the probability of getting a sum of six when a dice is thrown twice?

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See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

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Amazing Facts

No Solution

In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki