Daily Practice
Foundation Plus
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9th January 1988
- 1Probability Trees3 marks
A bag holds 9 red and 3 blue counters. One is taken, replaced, then another is taken. Work out the probability both are red.
- 2Scatter Graphs3 marks
A line of best fit on a scatter graph has equation y = 4x + 9. Use it to estimate y when x = 11.
- 3Prime Factors, HCF and LCM3 marks
Write 36 as a product of its prime factors, using index form.
- 4Expanding and Factorising2 marks
Expand and simplify 5(7x + 9).
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 7, y = 21. Work out y when x = 14.
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