Higher Plus
18th December 1978
- 1The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence -3, 2, 9, 18, ...
- 2Velocity Time Graphs2 marks
On a velocity-time graph a car speeds up in a straight line from 2 m/s to 12 m/s over 20 seconds. Work out the acceleration.
- 3Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that the exterior angle of a cyclic quadrilateral is being found. State the reason being quoted.
- 4Probability Equation Questions3 marks
A bag holds 5 counters, r of them red. Two are taken without replacement and P(both red) = 3/10. Work out r.
- 5Histograms3 marks
A histogram has two bars: one 20 units wide with frequency density 2.5, one 20 units wide with density 0.6. How many values in total?
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1978, including the monthly compilation PDF.