Puzzle 165
What is the only number not found in the Roman numerals system?
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Puzzle 166
How much soil is there...
...in a circular hole 2 metres deep and 1 metre across?
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Puzzle 167
Each of these words can have the same letter placed at the beginning and the end to form a new (common) word.
For example, -LIT- becomes ELITE by adding an E at both ends.
What are the new words?
-eve-
-able-
-carve-
-as-
-on-
-ode-
-elude-
-ape-
-ate-
-rod-
Puzzle Copyright © Kevin Stone
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Puzzle 168
If 7 ingots of IRON weigh 112 tonnes, 4 ingots of COBALT weigh 104 tonnes and 3 ingots of GOLD weigh 54 tonnes.
How heavy are 5 ingots of TIN?
Puzzle Copyright © Kevin Stone
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