Daily Practice
Higher
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21st February 1981
- 1Box Plots2 marks
A box plot has minimum 5, lower quartile 7, median 11, upper quartile 14 and maximum 18. Work out the interquartile range.
- 2Surds2 marks
Write sqrt(12) in the form a sqrt(b), where b is as small as possible.
- 3Expanding and Factorising Quadratics3 marks
Factorise x^2 + 10x + 25.
- 4Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 16. Work out y when x = 6.
- 5The Sine Rule3 marks
In triangle ABC, angle A is 58°, angle B is 46° and side a is 17 cm. Use the sine rule to work out side b, to 1 decimal place.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of February 1981, including the monthly compilation PDF.