Daily Practice

Higher Plus

14th January 1969

5 questions · 14 marks · Grades 8-9 · 51 question types in this band

1
Surds3 marks
Expand and simplify (3 + sqrt(7))(3 - sqrt(7)).
2
The Nth Term of a Quadratic Sequence2 marks
A quadratic sequence starts 10, 22, 42, 70. Work out the second difference, and the coefficient of n^2.
3
Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 4, y = 18. Work out y when x = 16.
4
Finding the Area of Any Triangle3 marks
A triangle has sides of 11 cm and 7 cm and an area of 33.34 cm^2. Work out the acute angle between those two sides, to the nearest degree.
5
Probability Equation Questions3 marks
A bag holds 11 counters, r of them red. Two are taken without replacement and P(both red) = 28/55. Work out r.

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