Foundation Plus
27th October 1956
- 1Ratio2 marks
Red and blue stickers are in the ratio 2 : 7. There are 28 red stickers. How many stickers are there altogether?
- 2Vectors2 marks
a is the column vector (-3, -6) and b is (4, -8). Work out a + b as a column vector.
- 3Probability Trees3 marks
3 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Scatter Graphs3 marks
A line of best fit on a scatter graph has equation y = 2x + 26. Use it to estimate y when x = 9.
- 5Error Intervals2 marks
A number y is 74 when truncated to the nearest whole number. Write down the error interval for y.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1956, including the monthly compilation PDF.