Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
22nd January 2009
- 1Best Buy Questions3 marks
A pack of 11 sponges costs £6.60. A pack of 44 costs £24.64. Which pack is better value?
- 2Vectors2 marks
a is the column vector (3, 5) and b is (-3, -6). Work out a + b as a column vector.
- 3Probability Trees3 marks
2 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Cumulative Frequency2 marks
Four classes in order have frequencies 7, 10, 6, 7. Write down the cumulative frequency at the end of the third class.
- 5Error Intervals2 marks
A number y is 89 when truncated to the nearest whole number. Write down the error interval for y.
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Every sheet is deterministic: the same date always regenerates the same five questions. All of January 2009, including the monthly compilation PDF.