Daily Practice
Higher
← All tiers
18th July 1989
- 1Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 2 : 5. Write y in terms of x.
- 2Vectors3 marks
a is the column vector (2, -6) and b is (-3, 3). Work out 2a - 2b as a column vector.
- 3Probability Trees3 marks
1 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Capture Recapture3 marks
40 fish are marked and released. Later 15 are caught, of which 5 are marked. Estimate the population.
- 5Surds2 marks
Write sqrt(20) in the form a sqrt(b), where b is as small as possible.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of July 1989, including the monthly compilation PDF.