Puzzle 17
How many squares of any size on this chessboard do not contain a rook?
Puzzle Copyright © Kevin Stone
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Hint
How many 2 x 2 squares are there?
Answer
There are 93 squares without a rook.
Reasoning
There are 60 squares of size 1 x 1.
There are 33 squares of size 2 x 2.
Giving a total of 60 + 33 = 93 squares.
Puzzle 18
What animal comes next in this sequence:
dog · rooster · monkey · sheep · horse · snake · ?
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Answer
Dragon.
From the Chinese calendar in reverse order.
Puzzle 19
Can you draw a continuous line that goes through every number in order, starting with 1, and ending with 6?
You can only move horizontally and vertically, every square must be visited, and the line must not cross itself.
Note: this puzzle is not interactive, and the numbers cannot be clicked.
Puzzle Copyright © Cihan Altay
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Hint
From the 1 go straight down.
Answer
Puzzle 20
What word completes this square:
ferret rabbit
otter ?
Choose from:
giraffe, mink, cow, bison
Puzzle Copyright © Kevin Stone
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Hint
Look at the first letters of the three words.
Answer
Giraffe.
The initial letters of the words spell FROG.
