ISEE Upper Level Word Problems: Factors and Multiples Practice Test 13

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1. If x is a factor of 16 and y is a factor of 28, which is the least value that xy could be a factor of?

  • A. 448
  • B. 112
  • C. 2
  • D. 1

2. If a and b are prime numbers, what is the least common multiple of 12a, 15ab, and 6a2?

  • A. 60a2b
  • B. 60ab
  • C. 12a2b
  • D. 12ab

3. If n is a positive integer, then the product of 14n and 15n is NOT necessarily divisible by which of the following?

  • A. 5
  • B. 10
  • C. 12
  • D. 21

4. What is the sum of the prime factors of 34?

  • A. 18
  • B. 19
  • C. 20
  • D. 21

5. What is the least common multiple of 24 and 32?

  • A. 768
  • B. 96
  • C. 64
  • D. 8