Daily Practice · Foundation Plus

Daily Practice - Foundation Plus

Grades 4-6 - the Foundation / Higher crossover zone.

6th September 2007

5 questions · 12 marks · Grades 4-6 · 128 question types in this band

1
Best Buy Questions3 marks
A pack of 8 teabags costs £4.80. A pack of 16 costs £8.64. Which pack is better value?
2
Vectors2 marks
a is the column vector (5, -2) and b is (-6, 8). Work out a + b as a column vector.
3
Probability Trees3 marks
5 of 7 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 minimum 3, lower quartile 9, median 18, upper quartile 23 and maximum 32. Work out the interquartile range.
5
Error Intervals2 marks
A number y is 54 when truncated to the nearest whole number. Write down the error interval for y.

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