McGraw-Hill Education GRE 2019

Exercise: Factors and Multiples

Discrete Quantitative Questions

For each question, select one answer, unless the instructions state otherwise.

1. What is the greatest common factor of 16, 24, and 72?
   A 2
   B 4
   C 8
   D 12
   E 16

For this question, write your answer in the box.

2. What is the least common multiple of 6, 8, and 15?

For Questions 3 and 4, indicate all the answer choices that apply.

3. If x is divisible by 12 and y is divisible by 8, then which of the following
   must be true?
   A xy is a multiple of 48
   B 64 is a factor of xy
   C xy is not divisible by 5
   D 32 is a factor of xy


4. If a is divisible by 6 and by 8, which of the following must be true?
   A a is divisible by 4
   B a is divisible by 12
   C a is divisible by 48


5. What is the greatest integer, k, such that 5k is a factor of the product of the
   integers from 1 through 24, inclusive?
   A 1
   B 2
   C 3
   D 4
   E 5

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