Puzzle 1
Which of the shapes are identical to the first one?
Puzzle Copyright © Robert A. Hartmann
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Hint
Try to rotate them around in your head, but watch out for mirror images.
Puzzle 2
Which is larger:
loaves in a dozen baker's dozen
points in the highest snooker break
Puzzle Copyright © Kevin Stone
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Hint
There are 13 loaves in a baker's dozen.
Answer
Loaves in a dozen baker's dozen.
Reasoning
A baker's dozen is 13, so a dozen baker's dozen is:
12 x 13 = 156 loaves
There are 15 red balls in snooker, and each of these can be followed by the black ball, and then the colours in order gives:
15 x (1 + 7) + 2 + 3 + 4 + 5 + 6 + 7 = 147 points
This can rise to 155 if the break follows a foul.
Puzzle 3
How many squares, of any size, are on a board divided up into 6 squares by 6 squares?
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Hint
How many 1 x 1 squares are there?
Answer
91 squares.
Reasoning
Squares of size:
1 x 1 = 36
2 x 2 = 25
3 x 3 = 16
4 x 4 = 9
5 x 5 = 4
6 x 6 = 1
Total = 36 + 25 + 16 + 9 + 4 + 1 = 91.
Puzzle 4
James, Simon, Ian, and William all like walking.
But Dave, Steven, Alan, and Alastair do not.
Does Adrian?
Puzzle Copyright © Kevin Stone
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Hint
Look at the number of letters in each of the names.
Answer
No.
Those that like walking have an odd number of letters in their name.