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Lintel Mar 5 - 11 25 questions
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Monday 5 March 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 91,000,000 in standard form

    Answer: 9.1 × 107
  2. 2. Algebra

    Factorise: x² - x - 72

    Answer: (x + 8)(x - 9)
  3. 3. Geometry

    Hypotenuse = 18cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 8.45cm
  4. 4. Ratio

    Black and white marbles are in the ratio 13:10. What fraction of the marbles are white?

    Answer: 10⁄23
  5. 5. Statistics

    Calculate the mean of: 28, 49, 9, 13, 5, 35, 22

    Answer: 23

Tuesday 6 March 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0068 in standard form

    Answer: 6.8 × 10-3
  2. 2. Algebra

    Factorise: x² + 6x - 40

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

    Adjacent = 17cm, angle = 38°. Find opposite. Give your answer to 2 decimal places

    Answer: 13.28cm
  4. 4. Ratio

    Divide 145 in the ratio 2:2:1

    Answer: 58, 58 and 29
  5. 5. Statistics

    Calculate the mean of: 8, 37, 27, 24, 25, 29

    Answer: 25

Wednesday 7 March 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 6,600,000 in standard form

    Answer: 6.6 × 106
  2. 2. Algebra

    Factorise: x² - 3x - 70

    Answer: (x + 7)(x - 10)
  3. 3. Geometry

    Hypotenuse = 15cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 9.64cm
  4. 4. Ratio

    Simplify: 6:18:9

    Answer: 2:6:3
  5. 5. Statistics

    The mean of 5 numbers is 27. If 4 of them are 34, 33, 22, 19, what is the missing number?

    Answer: 27

Thursday 8 March 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 620,000,000 in standard form

    Answer: 6.2 × 108
  2. 2. Algebra

    Factorise: x² + 11x + 18

    Answer: (x + 9)(x + 2)
  3. 3. Geometry

    Hypotenuse = 21cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 14.32cm
  4. 4. Ratio

    Simplify: 6:6:9

    Answer: 2:2:3
  5. 5. Statistics

    The mean of 4 numbers is 37. If 3 of them are 34, 30, 15, what is the missing number?

    Answer: 69

Friday 9 March 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00049 in standard form

    Answer: 4.9 × 10-4
  2. 2. Algebra

    Factorise: x² + 5x - 36

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

    Adjacent = 21cm, angle = 45°. Find opposite

    Answer: 21cm
  4. 4. Ratio

    Simplify: 4:12:4

    Answer: 1:3:1
  5. 5. Statistics

    Calculate the mean of: 39, 45, 38, 38, 32, 9, 21. Give your answer to 2 decimal places

    Answer: 31.71