Puzzle 1
Can you find a number …
… whose double exceeds its quarter by 7.
Puzzle Copyright © Kevin Stone
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Hint
The number is less than 100.
Answer
4.
4's double is 8, and 4's quarter is 1.
Reasoning
If the missing number is N, then:
2N = N + 7
—
4
Multiply throughout by 4:
8N = N + 28
Subtract N from both sides:
7N = 28
Divide throughout by 7:
N = 4
Puzzle 2
What letter comes next in this sequence:
A · O · E · A · O · T · F · ?
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Hint
This is quite a common representation of the alphabet.
Answer
L.
The last letter from hoteL, which is H in the phonetic alphabet, alphA, bravO, charliE, etc.
Puzzle 3
Hidden in the grid below are six hidden animals.
The letters are in sequence, but you move from letter to letter using the moves of a chess knight.
Once you have crossed off all of the animals, you will be left with seven unused letters.
What animal do these letters spell?
The moves of a knight are:
Note: this puzzle is not interactive, and the letters cannot be clicked.
Puzzle Copyright © Kevin Stone
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Hint
The L in the top row is the start of one of the animals.
Answer
Hamster.
The hidden animals are leopard, elephant, antelope, giraffe, kangaroo, goat.
Puzzle 4
Using all of the letters A to Z, each once only, complete these common words.
-e-rd
-u-et
wa-t-
-um-y
-e-er
a-o-e
mi--d
-hew-
hu-i-
-abi-
co--h
ho--e
arg--
Puzzle Copyright © Kevin Stone
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Hint
The first word begins with the letter B.
Answers
-e-rd = beard (BA)
-u-et = quiet (QI)
wa-t- = waltz (LZ)
-um-y = jumpy (JP)
-e-er = fever (FV)
a-o-e = awoke (WK)
mi--d = mixed (XE)
-hew- = chewy (CY)
hu-i- = humid (MD)
-abi- = habit (HT)
co--h = cough (UG)
ho--e = horse (RS)
arg-- = argon (ON)
This puzzle isn't guaranteed to have a unique answer, can you find another?
