Question

Tom has a collection of 13 snakes, 4 of which are purple and 5 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?

A)Purple snakes can add.
B) Purple snakes are happy.
C) Snakes that can add are purple.
D) Happy snakes are not purple.
E) Happy snakes can't subtract.

Answer 1

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Answer:

D) Happy snakes are not purple

Explanation:

The first statement tells us all happy snakes can add.

The second statement tells us that all purple snakes can't subtract, and the third statement tells us that purple snakes also cannot add.

Therefore, we must conclude that happy snakes are not purple.