PrepTest 57, Section 1, Question 15
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Exactly two mauve toys are included.
The stegosaur is red and is included.
The iguanadon is included only if it is green.
The plateosaur is included only if it is yellow.
The velociraptor is included only if the ultrasaur is not.
If both the lambeosaur and the ultrasaur are included, at least one of them is not mauve.
If the display includes a yellow tyrannosaur, then which one of the following must be true?
The iguanadon is included in the display.
The plateosaur is not included in the display.
The display includes two yellow toy dinosaurs.
The display contains a green lambeosaur.
The display contains a mauve velociraptor.
Explanations
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