GRE Exam Logical Reasoning Logical Sequences

New cars leave a car factory in a repeating pattern of red, blue, black, and gray cars. If the first car to exit the factory was red, what color is the 463rd car to exit the factory? A) Red B) blue C) black D) gray

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GRE Other Question
When x is divided by z, the result is y and remainder q, then which of the following must be true ?
A) z(y+q)=z B) xz - q = y C) x/z = y + q D) x/z - y = q/z E) x/z = yz + q Each factor of 210 is inscribed on its own plastic ball, and all of the balls are placed in a jar. If a ball is randomly selected from the jar, what is the probability that the ball is inscribed with a multiple of 42? (A) 1/7 (B) 1/4 (C) 1/8 (D) 1/16