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IKMC 2012 - Grades 9-10 - Self-study Question 8

IKMC · IKMC 2012 - Grades 9-10 - Self-study

Question 8

In four expressions, replacing every 8 by the same other positive number leaves the result unchanged. Which expression lacks this property?
  1. (8+8−8):8
  2. 8+(8:8)−8
  3. 8: (8+8+8)
  4. 8−(8:8)+8
  5. 8 × (8:8):8