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2021 AMC 10A Problem 7

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2021 AMC 10A Problem 7AMC 10 Step by Step
Name:                             Date: September 13, 2026
Logic Puzzles · difficulty 2 of 5 · about 2 min · position P1-10

Tom has a collection of 1313 snakes, 44 of which are purple and 55 of which are happy. He observes that

  • all of his happy snakes can add,
  • none of his purple snakes can subtract, and
  • all of his snakes that can't subtract also can't add.

Which of these conclusions can be drawn about Tom's snakes?

  1. A)

    Purplesnakescanadd.Purple snakes can add.

  2. B)

    Purplesnakesarehappy.Purple snakes are happy.

  3. C)

    Snakesthatcanaddarepurple.Snakes that can add are purple.

  4. D)

    Happysnakesarenotpurple.Happy snakes are not purple.

  5. E)

    Happysnakescan′tsubtract.Happy snakes can't subtract.

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