Brain Warm-Up
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Here are 5 simple problems for you to try
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Coins
Puzzle 1

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Puzzle 2

A boy paid 11 rubles for a bottle with a cork. The bottle costs 10 rubles more than the cork. How much does the cork cost?
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Puzzle 3

You have three keys for three suitcases with different locks. Each key fits only one suitcase. What is the minimum number of attempts needed to determine which key opens which suitcase?
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Answer
10Puzzle 4

What number should be inside the black triangle?
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Answer
10Puzzle 5

You need to replace the ellipsis with a word that, when combined with other words, forms new words. What is this three-letter word?
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