Puzzle 1
Using all of the letters A to Z, each once only, complete these common words.
ba-g-
d--ed
dia--
-uo-a
i-de-
-o-el
-um-s
py--y
g-ou-
--nal
tra--
-umb-
d--ty
Puzzle 2
What is the minimum number of queens required on a chessboard such that all squares are attacked?
Puzzle 3
Hidden in the grid below are eight, 7-letter words. Each word begins with the central V and you can move one letter in any direction to the next letter. All of the letters are used exactly once each. What are the words?
| R | E | T | N | R | E | N |
| I | P | M | A | G | I | Y |
| I | L | A | A | A | C | C |
| L | N | A | V | A | C | N |
| A | R | A | A | A | C | A |
| H | N | U | R | I | O | U |
| S | I | L | T | E | D | S |
Note: this puzzle is not interactive, and the letters cannot be clicked.
Puzzle 4
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.
