Daily Practice

Higher

21st January 1981

5 questions · 12 marks · Grades 6-7 · 61 question types in this band

1
Probability Trees3 marks
2 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
2
Cumulative Frequency2 marks
Four classes in order have frequencies 12, 5, 9, 7. Write down the cumulative frequency at the end of the third class.
3
Standard Form2 marks
Work out (6 x 10^3) x (9 x 10^5). Give your answer in standard form.
4
Factorising Harder Quadratics3 marks
Factorise 16x^2 + 8x - 15.
5
Speed and Density2 marks
A block has volume 160 cm^3 and density 2.5 g/cm^3. Work out its mass.

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