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Hard Puzzles 



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Puzzle 21 



A rich aristocrat decided that he would give every man 45 dollars and every woman 60 dollars.

Only one ninth of the men and only one twelfth of the women collected their dues.

Can you tell me how much money the aristocrat spent if there were 3552 people in total?

Puzzle Copyright © Kevin Stone

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Puzzle 22 



Below is a very special grid, around each shaded number are 8 white squares. However, each white square should have a number from 1 to 7. Once filled in, these 8 numbers will sum to the shaded number. In addition, once completed correctly, no row nor column will contain a duplicate number within a white square. For example, the top row may be 5 6 4 2 3 1 7, etc. This is a very difficult puzzle, and many people resort to using a computer to help them.

Puzzle Copyright © Kevin Stone

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Puzzle 23 



As the auditor for my local theme park, I noticed that on Saturday there were 4296 children and 2143 adults and the takings were £98,718.

However, on Sunday, there were 5146 children and 2807 adults and the takings were £122,570.

How much were the children's tickets and adult's tickets?

Puzzle Copyright © Kevin Stone

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Puzzle 24 



Find two words, which are anagrams of each other, which complete this sentence:

Due to a recent outbreak of a {?} infection in the zebra house, the local animal sanctuary had to {?} their electron microscope correctly, to ensure rapid detection.

Puzzle Copyright © Kevin Stone

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