Higher
9th December 1980
- 1SOHCAHTOA (Trigonometry)3 marks
A right-angled triangle has sides 8 cm, 15 cm and 17 cm. Work out the angle opposite the 8 cm side, to 1 decimal place.
- 2Probability Trees3 marks
A bag holds 4 red and 6 blue counters. Two are taken without replacement. Work out the probability both are red.
- 3Capture Recapture3 marks
35 voles are marked and released. Later 15 are caught, of which 3 are marked. Estimate the population.
- 4Reverse Percentages3 marks
A bill is £840 including VAT at 20%. Work out the amount before VAT.
- 5Parallel and Perpendicular Lines3 marks
Work out the equation of the line parallel to y = -2x + 7 that passes through (4, -15).
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1980, including the monthly compilation PDF.