Count the Hens

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?




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You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
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How can I get the answer 24 by only using the numbers 8,8,3,3?

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If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

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Find out the missing number in the picture attached:

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Replace the (?) with the correct mathematical signs to make the expression equal to 59.

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How many triangles are there in the picture below?

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Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

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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