Daily Practice
Higher
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4th March 1980
- 1Capture Recapture3 marks
60 voles are marked and released. Later 24 are caught, of which 4 are marked. Estimate the population.
- 2The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 2 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 3Changing the Subject of a Formula3 marks
Make x the subject of y = 2x^2 - 2.
- 4Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 4 : 5. Write y in terms of x.
- 5Circle Theorems2 marks
ABCD is a cyclic quadrilateral. Angle ABC is 87°. Work out angle ADC.
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