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Lintel Jan 23 - 29 25 questions
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Monday 23 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    660000

    Answer: 6.6 × 105
  2. 2. Algebra

    Factorise: x² + 5x - 6

    Answer: (x + 6)(x - 1)
  3. 3. Geometry

    Hypotenuse = 20cm, angle = 59°. Find adjacent side

    Answer: 10.3cm
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 4 numbers is 28. If 3 of them are 47, 27, 17, what is the missing number?

    Answer: 21

Tuesday 24 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 180,000 in standard form

    Answer: 1.8 × 105
  2. 2. Algebra

    Factorise: x² - x - 6

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

    Hypotenuse = 24cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 16.37cm
  4. 4. Ratio

    Divide 189 in the ratio 4:3:2

    Answer: 84, 63 and 42
  5. 5. Statistics

    Calculate the mean of: 18, 43, 15, 29, 36, 39, 44, 6

    Answer: 28.75

Wednesday 25 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00034 in standard form

    Answer: 3.4 × 10-4
  2. 2. Algebra

    Factorise: x² - 11x - 12

    Answer: (x + 1)(x - 12)
  3. 3. Geometry

    Adjacent = 18cm, angle = 53°. Find opposite. Give your answer to 2 decimal places

    Answer: 23.89cm
  4. 4. Ratio

    Express the second part of 2:7 as a fraction in simplest form

    Answer: 7⁄9
  5. 5. Statistics

    The mean of 5 numbers is 35. If 4 of them are 36, 36, 43, 22, what is the missing number?

    Answer: 38

Thursday 26 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 72,000,000 in standard form

    Answer: 7.2 × 107
  2. 2. Algebra

    Factorise: x² - 8x - 9

    Answer: (x + 1)(x - 9)
  3. 3. Geometry

    Hypotenuse = 18cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 16.18cm
  4. 4. Ratio

    Express the second part of 10:2 as a fraction in simplest form

    Answer: 1⁄6
  5. 5. Statistics

    The mean of 4 numbers is 37. If 3 of them are 21, 31, 30, what is the missing number?

    Answer: 66

Friday 27 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.000071 in standard form

    Answer: 7.1 × 10-5
  2. 2. Algebra

    Factorise: x² + 2x - 35

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

    Adjacent = 28cm, angle = 57°. Find opposite. Give your answer to 2 decimal places

    Answer: 43.12cm
  4. 4. Ratio

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

    Answer: 12⁄23
  5. 5. Statistics

    Calculate the mean of: 9, 27, 32, 49, 20, 17, 9, 6. Give your answer to 2 decimal places

    Answer: 21.13