Daily Practice · Higher

Daily Practice - Higher

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

18th August 2006

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

1
Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 2, y = 12. Work out y when x = 7.
2
Vectors3 marks
a is the column vector (2, 0) and b is (-2, 1). Work out 2a - 5b as a column vector.
3
Probability Trees3 marks
2 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Capture Recapture2 marks
A capture-recapture estimate is made of the beetle population of a woodland. State one assumption the method relies on.
5
Reverse Percentages3 marks
A bill is £168 including VAT at 20%. Work out the amount before VAT.

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