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Riddles, one at a time

Which word fills the gap?

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Answer

COOK

COOL to COOK changes L to K; COOK to HOOK changes C to H.

Which number is the BIGGEST?

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Answer

CX

XC = 90, LX = 60, CX = 110, XL = 40. CX wins.

Which card do you get?

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Answer

B

Flip left-right first, then a quarter turn clockwise: card B.

How long to cut the log into 5 pieces?

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Answer

8 minutes

5 pieces need only 4 cuts: 4 × 2 = 8 minutes.

Which tokens pay 18 with the fewest tokens?

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Answer

9 + 9

Just 2 tokens. Biggest first, 16 + 1 + 1, needs 3.

Which number from 1 to 99 has the longest Roman numeral, written the usual way?

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Answer

88

88 = LXXXVIII, 8 letters. No other number below 100 has 8.

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