Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
- 1Best Buy Questions3 marks
A pack of 5 teabags costs £2.75. A pack of 10 costs £5.20. Which pack is better value?
- 2Vectors2 marks
a is the column vector (8, -5) and b is (-4, -2). Work out a + b as a column vector.
- 3Probability Trees3 marks
8 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Averages from Frequency Tables2 marks
Grouped data has five classes of width 10, the first being 40 < x <= 50. The frequencies in order are 7, 3, 16, 11, 21. Write down the modal class.
- 5Error Intervals2 marks
A number y is 12 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 May 1999, including the monthly compilation PDF.