Riddles, one at a time

Which gem is INSIDE the loop?

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Answer

A

A line from A to the edge crosses the wall once (odd): A is inside. B, C and D reach the edge without crossing.

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Which word fills the gap?

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Answer

MILL

HILL to MILL changes H to M; MILL to MILK changes L to K.

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Which object fits all three clues?

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Answer

Map

Its roads have no cars, its rivers have no water, and it folds into a pocket: A.

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I am a three-digit number. My three digits are all different, and they multiply to 6. I am even, and I am less than 200. What number am I?

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Answer

132

Different digits that multiply to 6 can only be 1, 2 and 3. Below 200 means starting with 1: 123 or 132. Only 132 is even.

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A melon weighs 2 kg plus one third of its own weight. How much does the melon weigh?

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Answer

3 KG

The 2 kg must be the other two thirds, so one third is 1 kg and the melon is 3 kg.

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A straight 15 m fence has a post every 3 m, with one at each end. How many posts are there?

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Answer

6

15 ÷ 3 = 5 gaps, and 5 gaps need 6 posts.

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Inside the Loop: Four Gems