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IKMC 2010 - Grades 7-8 - Self-study Question 1

IKMC · IKMC 2010 - Grades 7-8 - Self-study

Question 1

How much is 12 + 23 + 34 + 45 + 56 + 67 + 78 + 89?
  1. 396
  2. 404
  3. 405
  4. other answer