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CAT 2011 | Question: 6

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Vaibhav wrote a certain number of positive prime numbers on a piece of paper. Vikram wrote down the product of all the possible triplets among those numbers. For every pair of numbers written by Vikram, Vishal wrote down the corresponding $\text{GCD}.$ If $90$ of the numbers written by Vishal were prime, how many numbers did Vaibhav write?

  1.  $6$
  2. $8$
  3. $10$
  4. Cannot be determined

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