Puzzle 17
If a farmer buys chicken feed for £1.26 per tonne, pig feed for £2.74 per tonne and cattle feed for 78p per tonne. The feed can only be purchased by the tonne, and part tonnes aren't sold.
How much of each would he have if he had 100 tonnes for £100?
Puzzle Copyright © Kevin Stone
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Answer
5 tonnes of chicken feed, 10 tonnes of pig feed and 85 tonnes of cattle feed.
Puzzle 19
If a bottle weighs eight ounces plus half a bottle …
… what is the weight of a bottle and a half?
Puzzle Copyright © Kevin Stone
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Hint
Find the weight of the bottle first.
Answer
24 ounces.
The bottle weighs 16 ounces.
Reasoning
As a bottle (B) weighs eight ounces plus half a bottle, we can write this as:
B = 8 + 1 /2 x B
1 /2 x B = 8
B = 16
As the bottle weighs 16 ounces, a bottle and a half weighs 16 + 8 = 24 ounces.
Puzzle 20
What common animal comes next in this sequence:
eel · cat · lion · ibex · panda · squirrel · ?
Puzzle Copyright © Kevin Stone
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Hint
Look at the initial letters.
Answer
Elephant.
The initial letters form the word ECLIPSE, so any animal beginning with E will work.
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