Foundation Plus
17th November 1961
- 1Changing the Subject of a Formula3 marks
Make x the subject of y = 7x^2 - 5.
- 2Proportion2 marks
7 identical pens cost £12.60. Work out the cost of 10 of the same pens.
- 3Pythagoras2 marks
A right-angled triangle has a hypotenuse of 41 cm and one shorter side of 40 cm. Work out the other shorter side.
- 4Probability Trees3 marks
A bag holds 2 red and 4 blue counters. One is taken, replaced, then another is taken. Work out the probability both are red.
- 5Averages from Frequency Tables3 marks
In a survey 9 households own 1 car, 2 own 2 cars and 4 own 3 cars. Work out the mean number of cars, to 2 decimal places.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of November 1961, including the monthly compilation PDF.