HANS WOYDA MATHEMATICS QUIZ COMPETITION 1999/2000

An jigsaw has m rows and n columns, where n > m > 2 (so that the puzzle has “landscape” orientation). Year. 7-9 1) A jigsaw has 35 pieces. Find how many pieces have exactly one straight edge. 2) A jigsaw has 77 pieces. Find how many pieces have at least one straight edge. HANS WOYDA MATHEMATICS QUIZ COMPETITION 2011/2012. ROUND 3 ................
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