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SEAMO 2027 - Paper D - SET 02 - Self-study Question 15

SEAMO · SEAMO 2027 - Paper D - SET 02 - Self-study

Question 15

Let $n=(2^4-1)(3^6-1)(5^{10}-1)(7^{12}-1)$. Which statement is true?
  1. n is divisible by 5, 7 and 11 but not 13.
  2. n is divisible by 5, 7 and 13 but not 11.
  3. n is divisible by 5, 11 and 13 but not 7.
  4. n is divisible by 7, 11 and 13 but not 5.
  5. None of the above