Daily Practice

Foundation Plus

1st January 1972

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

1
Ratio2 marks
Red and blue marbles are in the ratio 7 : 9. There are 84 red marbles. How many marbles are there altogether?
2
Vectors2 marks
a is the column vector (7, 0) and b is (-7, -1). Work out a + b as a column vector.
3
Probability Trees3 marks
4 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Scatter Graphs3 marks
A line of best fit on a scatter graph has equation y = 2x + 21. Use it to estimate y when x = 4.
5
Error Intervals2 marks
A number y is 39 when truncated to the nearest whole number. Write down the error interval for y.

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