Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 44)

Page 44 of 182

If x and y are positive integers (x>y), what is the units’ digit of (10x – 9y)2 ?

  1. 9.
  2. 7.
  3. 5.
  4. 3.
  5. 1.

Answer(s): E

Explanation:

Try some numbers, x=2, y=1.
(106 – 92)2 = 81. And it will work with any given number under the conditions given.



If (R, R2 + 1) is the (x, y) coordinate of a point located on the line: Y = 2X + 4, what Can be the value of the parameter R?

  1. –3.
  2. 2.
  3. 4.
  4. 3.
  5. 1.

Answer(s): D

Explanation:

If the point is on the line then you can plug the coordinate into the equation. Y = 2X + 4 R2+1 = 2R + 4 R= 3 or R= -1. Therefore, the best answer is D.



A(5, w3) is the (x, y) coordinate of point located on the parabola Y = X2 + 2. What is the value of w?

  1. 3.
  2. 4.
  3. 5.
  4. 6.
  5. 9.

Answer(s): A

Explanation:

Plug into the equation the coordinate to get: w3 = 52 + 2 = 27 w = 3.



A jar of 264 marbles is divided equally among a group of marble-players. If 2 people join the group, each one would receive 1 marble less. How many people are there in the group today?

  1. 20.
  2. 21.
  3. 22.
  4. 23.
  5. 24.

Answer(s): C

Explanation:

You can back-solve it. 264 marbles divided by 22 (answer C) is 12 marbles per person. If two people join, there will be 24 people, 264/24 is 11, which is 1 marble less.



Page 44 of 182



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