Puzzle 17
In this long division, each number has been replaced by another. The answer has also been removed. Can you determine the answer?
....
———————
75 | 796767
791
——
57
30
——
86
82
——
47
47
——
9
Puzzle Copyright © Kevin Stone
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Puzzle 18
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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Puzzle 19
This multiplication contains the numbers 1-9. Can you complete it?
...
3. x
————
....
Puzzle Copyright © Kevin Stone
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Puzzle 20
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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