Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20131109 08:33:11
Covering a square by circlesThere is a square which can be covered by 25 circles each of radius 2 cm (by this, I mean some parts of these circles can overlap, some parts can be outside the square: just that the interior of the square can be covered by these 25 circles). 