April 2002, Stage 4&5

Problems

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Mediant Madness

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

Kyle and his teacher disagree about his test score - who is right?

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Lens Angle

Stage: 4 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Find the missing angle between the two secants to the circle when the two angles at the centre subtended by the arcs created by the intersections of the secants and the circle are 50 and 120 degrees.