Daily Practice

Foundation Plus

25th October 1977

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

1
Writing and Simplifying Ratio2 marks
Write the ratio 4 : 16 in the form 1 : n.
2
Vectors2 marks
a is the column vector (4, 5) and b is (2, -4). Work out a + b as a column vector.
3
Probability Trees3 marks
6 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Capture Recapture3 marks
10 beetles are marked and released. Later 12 are caught, of which 2 are marked. Estimate the population.
5
Error Intervals2 marks
A number y is 58 when truncated to the nearest whole number. Write down the error interval for y.

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