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Lintel Oct 24 - 30 25 questions
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Monday 24 October 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 450,000 in standard form

    Answer: 4.5 × 105
  2. 2. Algebra

    Factorise: x² + 4x - 60

    Answer: (x + 10)(x - 6)
  3. 3. Geometry

    Hypotenuse = 18cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 14.18cm
  4. 4. Ratio

    Divide 168 in the ratio 1:1:4

    Answer: 28, 28 and 112
  5. 5. Statistics

    The mean of 4 numbers is 30. If 3 of them are 21, 40, 18, what is the missing number?

    Answer: 41

Tuesday 25 October 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0096 in standard form

    Answer: 9.6 × 10-3
  2. 2. Algebra

    Factorise: x² - 2x - 35

    Answer: (x + 5)(x - 7)
  3. 3. Geometry

    Adjacent = 28cm, angle = 39°. Find opposite. Give your answer to 2 decimal places

    Answer: 22.67cm
  4. 4. Ratio

    Express the second part of 12:11 as a fraction in simplest form

    Answer: 11⁄23
  5. 5. Statistics

    Calculate the mean of: 10, 13, 15, 26, 9, 41, 6, 48

    Answer: 21

Wednesday 26 October 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 38,000,000 in standard form

    Answer: 3.8 × 107
  2. 2. Algebra

    Factorise: x² - 5x - 36

    Answer: (x + 4)(x - 9)
  3. 3. Geometry

    Hypotenuse = 21cm, angle = 60°. Find adjacent side

    Answer: 10.5cm
  4. 4. Ratio

    Divide 210 in the ratio 2:2:1

    Answer: 84, 84 and 42
  5. 5. Statistics

    Calculate the mean of: 13, 44, 20, 33, 46, 46. Give your answer to 2 decimal places

    Answer: 33.67

Thursday 27 October 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0026 in standard form

    Answer: 2.6 × 10-3
  2. 2. Algebra

    Factorise: x² + 2x - 3

    Answer: (x + 3)(x - 1)
  3. 3. Geometry

    Adjacent = 25cm, angle = 49°. Find opposite. Give your answer to 2 decimal places

    Answer: 28.76cm
  4. 4. Ratio

    Express the second part of 10:11 as a fraction in simplest form

    Answer: 11⁄21
  5. 5. Statistics

    The mean of 4 numbers is 22. If 3 of them are 26, 17, 18, what is the missing number?

    Answer: 27

Friday 28 October 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00047 in standard form

    Answer: 4.7 × 10-4
  2. 2. Algebra

    Factorise: x² - 6x - 40

    Answer: (x + 4)(x - 10)
  3. 3. Geometry

    Adjacent = 15cm, angle = 54°. Find opposite. Give your answer to 2 decimal places

    Answer: 20.65cm
  4. 4. Ratio

    Simplify: 12:12:24

    Answer: 1:1:2
  5. 5. Statistics

    The mean of 5 numbers is 32. If 4 of them are 32, 17, 44, 23, what is the missing number?

    Answer: 44