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IMC 2009 Q2

IMCCurrent spec5 marksFactors, Primes & Digits

2. What is the sum of the first five non-prime positive integers?

  1. A 15
  2. B 18
  3. C 27
  4. D 28
  5. E 39

Intermediate Mathematical Challenge 2009, Question 2. © UK Mathematics Trust. Original paper on ukmt.org.uk

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