Daily Practice · Higher

Daily Practice - Higher

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

19th December 2010

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

1
Direct and Inverse Proportion3 marks
y is inversely proportional to x. When x = 3, y = 12. Work out y when x = 4.
2
Vectors3 marks
a is the column vector (5, 5) and b is (-5, -3). Work out 5a - 5b as a column vector.
3
Probability Trees3 marks
5 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Box Plots2 marks
A box plot has a minimum of 9 and a maximum of 23. Work out the range.
5
Reverse Percentages3 marks
A bill is £120 including VAT at 20%. Work out the amount before VAT.

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