Daily Practice · Higher

Daily Practice - Higher

Grades 6-7 - Higher-tier method and manipulation.

16th July 2016

5 questions · 14 marks · Grades 6-7 · 61 question types in this band

1
Probability Trees3 marks
3 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
2
Box Plots2 marks
A box plot has minimum 4, lower quartile 12, median 18, upper quartile 25 and maximum 33. Work out the interquartile range.
3
Standard Form3 marks
Work out (20 x 10^12) / (4 x 10^4). Give your answer in standard form.
4
Factorising Harder Quadratics3 marks
Factorise 9x^2 - 25.
5
Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 4, y = 80. Work out y when x = 3.

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