Puzzle 701
Are there more millimetres in a mile or …
… sixteenths of an inch in 2 kilometres?
Puzzle Copyright © Kevin Stone
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Answer
Millimetres in a mile.
Reasoning
One inch = 25.4mm.
So:
1 mile = 1760 yards = 1760 x 3 feet = 1760 x 3 x 12 inches = 1760 x 3 x 12 x 25.4 millimetres = 1,609,344mm in 1 mile.
And:
2 kilometres = 2000 metres = 2000 x 100 centimetre = 2000 x 100 x 10 millimetres = 2000 x 100 x 10 ÷ 25.4 inches = 2000 x 100 x 10 ÷ 25.4 x 16 = sixteenths of an inch ≈ 1,259,843 sixteenths of an inch in 2 kilometres.
Puzzle 702
Which is longer …
… 250 centimetres or 8 feet?
Puzzle Copyright © Kevin Stone
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Hint
There are 2.54 cm in an inch.
Answer
250 centimetres.
Reasoning
One inch = 2.54 cm.
And 1 foot = 12 inches = 30.48 cm.
So, 8 feet = 243.84 cm.
Puzzle 703
What well known saying is expressed here:
Refrain from enumerating your owned domestic fowl while their hard, porous calcium containers are undamaged.
Puzzle Copyright © Kevin Stone
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Answer
Don't count your chickens until they're hatched.
Puzzle 704
Eddie The Elephant can eat 110 bananas in 10 minutes, and Hugo The Hippo can eat 56 bananas in 8 minutes.
How long will it take Eddie and Hugo to eat 954 bananas?
Puzzle Copyright © Kevin Stone
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Hint
Work out how many each can eat in one minute.
Answer
53 minutes.
Reasoning
In one minute, Eddie eats 11 bananas (= 110 ÷ 10).
In one minute, Hugo eats 7 bananas (= 56 ÷ 8).
So in total, they eat 18 bananas every minute.
So it will take 954 ÷ 18 = 53 minutes.
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