13+ Common Entrance · Topic guide

Maths: Full Practice Paper (Additional, Level 3, Set 2)

This is the second full practice paper for Additional Mathematics (Level 3), the further 13+ Common Entrance paper sat only by candidates entered for it, giving a complete timed paper of algebra, trigonometry, proportion and standard form questions beyond the Core syllabus.

Year 7-8 (13+)MathsISEB

Before you start

Make sure you're comfortable with these topics first:

Method

  1. Read every question fully before starting, since Additional Mathematics questions often combine two topics, such as Pythagoras' theorem inside a proportion problem.
  2. Revise right-angled trigonometry (SOHCAHTOA), Pythagoras' theorem, direct and inverse proportion, standard form and factorising quadratics before attempting the paper, since these appear repeatedly.
  3. Show full algebraic working for every step, since method marks are awarded for correct working even when a final answer is wrong.
  4. For proportion problems, always state the constant of proportionality explicitly, rather than trying to scale directly between two given values.
  5. Keep full accuracy through a multi-step calculation and round only the final answer, to the degree of accuracy the question asks for.
  6. Spend time in proportion to the marks available, so a 5 or 6 mark question near the end gets more time than an early 2 mark one.
  7. Check any quadratic solution by substituting it back into the original equation before moving on.

Worked example

A ramp has a horizontal length of 8 m and rises at an angle of 15 degrees to the horizontal. Work out the vertical height the ramp rises, giving your answer to 1 decimal place.

  1. Label the triangle: the horizontal length (8 m) is adjacent to the 15 degree angle, and the height needed is opposite.
  2. Since opposite and adjacent are involved, use tangent: tan(15) = height / 8.
  3. Rearrange and substitute: height = 8 x tan(15).
  4. Evaluate: 8 x 0.2679 = 2.1436.
  5. Round to 1 decimal place. Final answer: 2.1 m.

Practice questions

Type your answer and press Check to be marked straight away, or reveal the answer and mark yourself.

Q1A right-angled triangle has shorter sides of 5 cm and 12 cm. Work out the length of the hypotenuse.Show answer

Answer: 13 cm (5^2 + 12^2 = 169, sqrt(169) = 13)

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Q2y is directly proportional to x. When x = 6, y = 15. Work out y when x = 10.Show answer

Answer: 25 (the multiplier is 15 / 6 = 2.5, so y = 2.5 x 10 = 25)

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Q3Write 3.6 x 10^-3 as an ordinary number.Show answer

Answer: 0.0036

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Q4Solve x^2 - 5x + 6 = 0.Show answer

Answer: x = 2 or x = 3 (factorises to (x - 2)(x - 3) = 0)

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Q5In a right-angled triangle, the angle at A is 32 degrees and the adjacent side is 9 cm. Work out the length of the hypotenuse, to 1 decimal place.Show answer

Answer: 10.6 cm (hypotenuse = 9 / cos(32) = 10.6126, which rounds to 10.6)

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Q6p is inversely proportional to q. When q = 3, p = 20. Work out p when q = 12.Show answer

Answer: 5 (the constant is 3 x 20 = 60, so p = 60 / 12 = 5)

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Exam-style questions

Written in the style of a 13+ Common Entrance exam paper, with a full mark scheme.

Q1[3 marks]

Solve the equation x^2 + 2x - 15 = 0.

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Q2[4 marks]

The height h (in metres) of a cone-shaped tent of fixed volume is inversely proportional to the square of its base radius r. When r = 2, h = 6. (a) Find h when r = 4. (b) State what happens to h if r is tripled.

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Q3[4 marks]

A right-angled triangle has a hypotenuse of 20 cm and one angle of 35 degrees. (a) Find the length of the side opposite the 35 degree angle, to 1 decimal place. (b) Find the length of the side adjacent to the 35 degree angle, to 1 decimal place.

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Free printable worksheet

Want more practice on paper? Download the maths: full practice paper (additional, level 3, set 2) worksheet pack - 9 pages of exam-style questions with a full mark scheme. One email opens every download in this browser for 14 days - no account, no card. Print it for personal and classroom use.

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