VTMO 2026 - Grade 6 - Semifinal - SET 5 - Self-study Question 1

Question 1

In which expression can the number 6 be replaced by another integer without changing the result?

Clarification: replace every 6 by the same nonzero integer, and require the result to stay unchanged for every such choice.

Question illustration

$(6+6)\div6+6$
$6\times(6+6)\div6$
$6+6-6+6$
$(6+6-6)\times6$
$(6+6-6)\div6$