Daily Practice

Higher

13th October 1990

5 questions · 13 marks · Grades 6-7 · 61 question types in this band

1
Probability Trees3 marks
7 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 6, lower quartile 10, median 18, upper quartile 21 and maximum 27. Work out the interquartile range.
3
Bounds2 marks
A mass is 710 kg, correct to the nearest 10. Write down the lower bound.
4
Factorising Harder Quadratics3 marks
Factorise 4x^2 + 12x + 5.
5
Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 32. Work out y when x = 8.

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