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Hard Puzzles 



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Puzzle 21 



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 22 



As the auditor for my local theme park, I noticed that on Saturday there were 4,296 children and 2,143 adults and the takings were £98,718.

However, on Sunday, there were 5,146 children and 2,807 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 23 



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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Puzzle 24 



Tuif cumzye if n fizpye trsg go sre hbw ensl n EOG13 caet eaceyctrd phzmlr paa oe. Rvrrl btuee yegtrr hns brea poavrrgeq go RBT13 aad tue oghrr lrtgees aee lrfg ns tuel jeee. Oug, ybu mny afk, jhnt if ghr cumzye? Wrly, hbw mnnl joedf nrr vn tuif cumzye!

Puzzle Copyright © Kevin Stone

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