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SASMO 2019 Grade 9 Question 2

SASMO · SASMO 2019 Grade 9

Question 2

Let x be a positive integer whose prime factors are 5 and 11 only. If x has exactly 6 different positive integer factors, what is the smallest value of x?

Interpretation: Both 5 and 11 occur as prime factors.
  1. 110
  2. 605
  3. 165
  4. 275
  5. None of the above