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BEBRAS 2017 Grade 7-8 Round 2 Ext Question 11

BEBRAS · BEBRAS 2017 Grade 7-8 Round 2 Ext

Question 11

Beavers repaint a 16 m×16 m museum floor using numbered plan sheets that refer to one another. Each sheet gives its scale; the first illustration shows how a 10 m sheet uses two 5 m detail sheets.

Question illustration

The actual recursive plan below refers to itself. One beaver says the second sheet is essential because it tells them when to stop.

Question illustration

The left sheet applies at 16 m, 8 m, …, 1 m; the second, solid-gray diagram applies at 0.5 m. Preserve the orientation of each reference number when placing a smaller copy. Which floor pattern results?

Question illustration
  1. Figure A
  2. Figure B
  3. Figure C
  4. Figure D