Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
21st January 2003
- 1Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 2.5, one 25 units wide with density 3.5. How many values in total?
- 2Surds3 marks
Expand and simplify (3 + sqrt(10))(3 - sqrt(10)).
- 3Iteration3 marks
Use the iteration x(n+1) = cube root of (10x(n) + 4) with x(0) = 3. Work out x(1) to 3 decimal places.
- 4Velocity Time Graphs2 marks
On a velocity-time graph a car speeds up in a straight line from 7 m/s to 17 m/s over 5 seconds. Work out the acceleration.
- 5Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that a tangent meets a radius at the point of contact. State the reason being quoted.
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