Question 15
A 9 × 9 chessboard may be covered without overlap with a combination of the following three shapes. What is the minimum number of copies of the piece consisting of three squares must be used?
IMAS 2012 — Upper Primary Grades 5–6 — Round 2 Question 15
IMAS · IMAS 2012 — Upper Primary Grades 5–6 — Round 2