Daily Practice · Foundation Plus

Daily Practice - Foundation Plus

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

20th April 2006

5 questions · 13 marks · Grades 4-6 · 128 question types in this band

1
Best Buy Questions3 marks
A pack of 8 batteries costs £2.80. A pack of 32 costs £10.24. Which pack is better value?
2
Vectors2 marks
a is the column vector (-1, 7) and b is (7, 1). Work out a + b as a column vector.
3
Probability Trees3 marks
6 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Averages from Frequency Tables3 marks
In a survey 5 households own 1 car, 7 own 2 cars and 6 own 3 cars. Work out the mean number of cars, to 2 decimal places.
5
Error Intervals2 marks
A number y is 60 when truncated to the nearest whole number. Write down the error interval for y.

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