Puzzle 1
Which letter is missing from this sequence:
b · c · e · g · k · q · s · w
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Hint
Convert the letters to positions in the alphabet.
Answer
M.
Reasoning
These are letters that occupy prime number positions in the alphabet:
b = 2
c = 3
e = 5
g = 7
k = 11
m = 13 *
q = 17
s = 19
w = 23
Puzzle 2
What comes next in this sequence:
boron · carbon · nitrogen · oxygen · ?
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Hint
The first in the list would be Hydrogen.
Answer
Fluorine.
These are the elements in atomic number order.
Puzzle 3
What animal comes next in this sequence:
gorilla · hedgehog · camel · mouse · fox · bear · mole · ?
Choose from:
porcupine, badger, cow, giraffe, squirrel, rhinoceros
Puzzle Copyright © Kevin Stone
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Hint
A very common sequence is hidden here.
Answer
Badger.
Reasoning
The length of the words is the same length as the months of the year.
gorilla = 7 = January
hedgehog = 8 = February
camel = 5 = March
mouse = 5 = April
fox = 3 = May
bear = 4 = June
mole = 4 = July
badger = 6 = August
Puzzle 4
Kevin's mother has three children.
The first was called Alpha, the second was called Beta.
What was the name of the third?
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Hint
Make sure that you read the question carefully.
Answer
Kevin, since it was Kevin's mother and Kevin's brothers were Alpha and Beta.
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