Daily Practice

Foundation Plus

22nd February 1962

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

1
Best Buy Questions3 marks
A pack of 11 pencils costs £6.05. A pack of 44 costs £22.88. Which pack is better value?
2
Vectors2 marks
a is the column vector (-8, -6) and b is (4, -6). Work out a + b as a column vector.
3
Probability Trees3 marks
1 of 5 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 6, lower quartile 12, median 20, upper quartile 29 and maximum 33. Work out the interquartile range.
5
Error Intervals2 marks
A number y is 11 when truncated to the nearest whole number. Write down the error interval for y.

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