Hard Puzzles 

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, which is a challenge in itself.

Puzzle Copyright © Kevin Stone

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This multiplication contains the numbers 1-9. Can you complete it?
 ...
  3. x
————
....

Puzzle Copyright © Kevin Stone

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What letter is missing from this sequence:

A  A  A  A  {?}  A  A  A  A  A  A
Clue: the answer is not A!

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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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