Daily Practice
Higher
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20th December 1983
- 1Capture Recapture3 marks
20 voles are marked and released. Later 32 are caught, of which 8 are marked. Estimate the population.
- 2The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 3Expanding Triple Brackets3 marks
Expand and simplify (x - 4)(x - 3)(x - 5).
- 4Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 4 : 5. Write y in terms of x.
- 5Pythagoras2 marks
A right-angled triangle has a hypotenuse of 10 cm and one shorter side of 6 cm. Work out the other shorter side.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1983, including the monthly compilation PDF.