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VTMO 2016 — Grade 6 — semifinal Question 1

VTMO · VTMO 2016 — Grade 6 — semifinal

Question 1

$A$ is the set of primes below $11$. How many subsets does A have?
  1. $32$
  2. $16$
  3. $64$
  4. $30$
  5. $6$