Higher
20th April 1965
- 1SOHCAHTOA (Trigonometry)3 marks
A right-angled triangle has sides 7 cm, 24 cm and 25 cm. Work out the angle opposite the 7 cm side, to 1 decimal place.
- 2Probability Trees3 marks
A bag holds 3 red and 7 blue counters. Two are taken without replacement. Work out the probability both are red.
- 3Capture Recapture3 marks
35 voles are marked and released. Later 54 are caught, of which 6 are marked. Estimate the population.
- 4Surds2 marks
Write sqrt(75) in the form a sqrt(b), where b is as small as possible.
- 5Parallel and Perpendicular Lines3 marks
Work out the equation of the line parallel to y = 3x + 8 that passes through (4, 19).
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Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1965, including the monthly compilation PDF.