IKMC 2027 - Grades 5-6 - Self-study SET 15 - Thematic Batch 3 Question 25

A staircase has 21 steps. Nick counts from 1 upwards, and Mike counts from 1 downwards. When they meet on the staircase, Nick has counted 10. What number has Mike reached?



“In the middle” means along the staircase, not necessarily its exact central step.