Puzzle 17
If four kittens can catch four toys in four minutes …
… how many toys can twelve kittens catch in twelve minutes?
Puzzle Copyright © Kevin Stone
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Hint
How many toys can one kitten catch in twelve minutes?
Answer
36 toys.
Reasoning
Four kittens can catch four toys in four minutes,
so, one kitten can catch one toy in four minutes,
so, one kitten can catch three toys in twelve minutes,
so, twelve kittens can catch 36 toys in twelve minutes.
Puzzle 18
What letter comes next in this sequence:
M · V · E · M · J · ?
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Hint
Look to the skies for the answer.
Answer
S.
From Saturn.
Reasoning
These are the initial letters of the planets.
M = Mercury
V = Venus
E = Earth
M = Mars
J = Jupiter
S = Saturn
Puzzle 19
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 20
What is the next number in this sequence:
1 · 1 · 2 · 4 · 3 · 9 · 4 · 61 · 5 · 52 · 6 · 63 · 7 · 94 · 8 · ?
Puzzle Copyright © Kevin Stone
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Hint
Can you see 1, 2, 3, …?
Answer
46.
Reasoning
Take the numbers in pairs, square the first, and reverse the digits.
1 1 (1 x 1 = 1, reversed is 1)
2 4 (2 x 2 = 4, reversed is 4)
3 9 (3 x 3 = 9, reversed is 9)
4 61 (4 x 4 = 16, reversed is 61)
5 52 (5 x 5 = 25, reversed is 52)
6 63 (6 x 6 = 36, reversed is 63)
7 94 (7 x 7 = 49, reversed is 94)
so we require:
8 46 (8 x 8 = 64, reversed is 46)
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