Daily Practice
Higher
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20th February 1980
- 1Probability Trees3 marks
2 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Cumulative Frequency2 marks
Four classes in order have frequencies 6, 3, 8, 7. Write down the cumulative frequency at the end of the third class.
- 3Fractional and Negative Indices2 marks
Write 6^-1 as a fraction.
- 4Factorising Harder Quadratics3 marks
Factorise 6x^2 + x - 15.
- 5Speed and Density2 marks
A block has volume 60 cm^3 and density 8 g/cm^3. Work out its mass.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of February 1980, including the monthly compilation PDF.