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VTMO 2019 — Grade 3 — semifinal Question 1

VTMO · VTMO 2019 — Grade 3 — semifinal

Question 1

How many white boxes are there in the $8 \times 8$ chessboard?

Question illustration
  1. $32$
  2. $64$
  3. $26$
  4. $72$
  5. $56$