Puzzle 505
Richard, Kevin, and James like coffee …
… Andrew, Anne, and John don't.
Does Simon like coffee?
Puzzle Copyright © Kevin Stone
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Hint
Look at the number of letters in each name.
Answer
Yes.
Because there is an odd number of letters in the name.
Puzzle 506
Here we have a rectangular room, measuring 30 feet by 12 feet, and 12 feet high.
There is a spider in the middle of one of the end walls, 1 foot from the ceiling (A).
There is a fly in the middle of the opposite wall, 1 foot from the floor (B).
What is the shortest distance that the spider must crawl in order to reach the fly?
The Spider and the Fly, The Canterbury Puzzles, Henry Ernest Dudeney.
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Hint
Going down and across the floor isn't the only route.
Answer
40 feet.
Explanation Diagram
If you imagine the room to be a cardboard box, you can 'unfold' the room in various ways, and each route gives a different answer.

We can use Pythagoras' theorem (a2 + b2 = c2) to calculate the distances:
distance2 = horizontal2 + vertical2
distance = √(horizontal2 + vertical2)
Route #1
distance = 1 + 30 + 11 = 42 feet.
Route #2
horizontal = 6 + 30 + 6 = 42 feet.
vertical = 10 feet.
distance = √(422 + 102) ≈ 43.174 feet.
Route #3
horizontal = 1 + 30 + 6 = 37 feet.
vertical = 6 + 11 = 17 feet.
distance = √(372 + 172) ≈ 43.178 feet.
Route #4
horizontal = 1 + 30 + 1 = 32 feet.
vertical = 6 + 12 + 6 = 24 feet.
distance = √(322 + 242) = 40 feet.
Puzzle 507
Moving from letter to letter using the moves of a chess knight, can you find the letters 'PUZZLES' in order?
| Z |
E |
Z |
S |
Z |
P |
S |
| U |
P |
S |
P |
L |
P |
Z |
| S |
U |
L |
U |
U |
E |
U |
| E |
E |
P |
U |
S |
U |
P |
| P |
Z |
L |
L |
U |
P |
Z |
| Z |
U |
Z |
S |
U |
L |
P |
| E |
P |
Z |
Z |
E |
L |
U |
Note: this puzzle is not interactive, and the squares cannot be clicked.
The moves of a knight are:

Puzzle Copyright © Kevin Stone
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Hint
It might be easier to find the S first.
Answer
Start with the P in the 5th row, 6th column:
Puzzle 508
Which word in the English language is …
… most often pronounced incorrectly?
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