Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
22nd January 2001
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 16, y = 20. Work out y when x = 9.
- 2Vectors Proof Questions3 marks
OACB is a parallelogram with vector OA = m and vector OB = p. X is the point dividing AB in the ratio 1 : 2. Write vector OX in terms of m and p.
- 3Probability Equation Questions3 marks
The probability of winning a game is 7/10. A player expects 21 wins. How many games did they play?
- 4Histograms3 marks
A histogram has four 20-wide classes from 0, with frequency densities 0.5, 3, 2, 1. Which class contains the median?
- 5Bounds3 marks
A block has mass 490 g (to the nearest 10 g) and volume 4 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.
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