Puzzle 197
Can you find a word that begins with the letter I …
… and by the addition of the letter A becomes another word that is pronounced the same?
Puzzle Copyright © Kevin Stone
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Hint
The final word starts with AI.
Answer
Isle becomes aisle.
Puzzle 198
What is the 20th prime number?
2, 3, 5, 7, …
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Hint
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, …
Answer
71.
The first twenty prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71.
Puzzle 199
If …
7/28 of 64 is 16,
and 9/12 of 100 is 75,
and 3/9 of 33 is 11,
what is 5/15 of 45?
Puzzle Copyright © Kevin Stone
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Hint
This puzzle is perhaps easier than it first appears.
Answer
15.
Using normal mathematics!
5/15 of 45 = 1/3 of 45 = 15.
Puzzle 200
What is so unusual about this sentence:
The quick brown fox jumps over the lazy dog.
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Hint
Look at the letters in the sentence.
Answer
It is a very short sentence in the English language that includes every letter of the alphabet.
