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IMC 2011 Q2

IMCCurrent spec5 marksAlgebraNumber & Arithmetic

2. To find the diameter in mm of a Japanese knitting needle, you multiply the size by 0.3 and add 2.1. What is the diameter in mm of a size 5 Japanese knitting needle?

  1. A 3.6
  2. B 7.4
  3. C 10.8
  4. D 12
  5. E 17.1

Intermediate Mathematical Challenge 2011, Question 2. © UK Mathematics Trust. Original paper on ukmt.org.uk

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