Puzzle 1
What number comes next in this sequence:
3 · 3 · 5 · 4 · 4 · 3 · 5 · ?
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Hint
This is a very common sequence.
Answer
5.
The numbers represent the number of letters of the words ONE, TWO, THREE, etc. Therefore the answer is the number of letters in the word EIGHT.
Puzzle 2
Can you find the country hidden in the following paragraph:
As managers, we deny all involvement in the unscrupulous dealings that have come to light in the recent interdepartmental investigation.
Puzzle Copyright © Kevin Stone
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Hint
The country spans more than one word.
Answer
Sweden.
As managerS, WE DEN y all involvement in the unscrupulous dealings that have come to light in the recent interdepartmental investigation.
Puzzle 3
What four-digit number has …
… Digit 2 smaller than Digit 4 which is two thirds of Digit 1 which is two thirds of Digit 3 which is three times Digit 2?
Puzzle Copyright © Kevin Stone
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Hint
Look at Digit 3 first.
Answer
6394.
Reasoning
Labelling the clues:
Digit 2 is smaller than Digit 4
Digit 4 is two thirds of Digit 1
Digit 1 is two thirds of Digit 3
Digit 3 is three times Digit 2
By (3), Digit 3 is divisible by 3:
Digit 3 = 3, 6, 9
By (3), Digit 1 is two thirds of Digit 3:
Digit 1 = 2, 4, 6.
But, by (2), Digit 1 is divisible by 3:
Digit 1 = 6, and Digit 3 = 9.
By (4), Digit 3 is three times Digit 2:
Digit 2 = 3.
By (2), Digit 4 is two thirds of Digit 1:
Digit 4 = 4.
Puzzle 4
What comes next in this sequence:
31 · 41 · 51 · 61 · 71 · 81 · 92 · ?
Puzzle Copyright © Kevin Stone
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Hint
Write the numbers without any spaces.
Answer
02.
These are the numbers 10 11 12 13 14 15 16 17 18 19 20 2 1 22, but spaced incorrectly.
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