SAT Math Practice Exam - Question List

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276. Two sides of a right angle triangle are 12 and 13. Which of the following could be length of the third side?I. 5II. 11III. √313
  1. I only
  2. II only
  3. III only
  4. I and III
277. If 82x-4= 42x, then x=
  1. 2
  2. 3
  3. 4
  4. 6
278. The average(arithmetic mean) of eight numbers is 12.5. When one number is discarded, the average of remaining numbers becomes 12.0. What is the discarded number?
  1. 10.5
  2. 12.0
  3. 12.5
  4. 16.0
279. If diagonal of a square room is d, what is the area of the room?
  1. d/√2
  2. d2/2
  3. d2√2
  4. 2d2
280. If 3x + 5y = 10 and 5x + 3y = 30, what is the average (arithmetic mean) of x and y?
  1. 2.5
  2. 4
  3. 5
  4. 10
  5. 20

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