Puzzle 485
At the equator the radius of the earth is 6,378 km, so its circumference is almost exactly 40,000 km.
Imagine we had a long rope which went around the equator, this would of course be 40,000 km long.
If we now placed 1 metre sticks vertically all the way around and lay the rope on top of these sticks (so the rope would be 1m higher all the way around) how much extra rope would we require?
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Puzzle 486
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 487
What comes next in this sequence:
hydrogen helium lithium beryllium boron {?}
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Puzzle 488
Here is a well known proverb with the consonants removed. What is the proverb?
A --i--- i- -i-e -a-e- -i-e.
Puzzle Copyright © Kevin Stone
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