Daily Practice

Foundation Plus

9th February 1985

5 questions · 11 marks · Grades 4-6 · 128 question types in this band

1
Ratio2 marks
Red and blue sweets are in the ratio 7 : 9. There are 49 red sweets. How many sweets are there altogether?
2
Vectors2 marks
a is the column vector (-3, 3) and b is (0, -8). Work out a + b as a column vector.
3
Probability Trees3 marks
4 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Scatter Graphs2 marks
A scatter graph plots a car's engine size and the miles it does per gallon. What type of correlation would you expect?
5
Error Intervals2 marks
A number y is 79 when truncated to the nearest whole number. Write down the error interval for y.

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