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A property developer sells two houses, each for £252,000.
Based on the prices he paid, he made a loss of 20% on one of the houses and a profit of 20% on the other.
Overall, did he make a profit or a loss? Of how much?
A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?
Four rods are hinged at their ends to form a convex quadrilateral. Investigate the different shapes that the quadrilateral can take. Be patient this problem may be slow to load.