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Lintel Apr 9 - 15 25 questions
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Monday 9 April 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 - 132

    Answer: (x + 12)(x - 11)
  3. 3. Geometry

    Adjacent = 21cm, angle = 31°. Find opposite. Give your answer to 2 decimal places

    Answer: 12.62cm
  4. 4. Ratio

    Simplify: 20:12:20

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

    The mean of 5 numbers is 32. If 4 of them are 37, 38, 19, 49, what is the missing number?

    Answer: 17

Tuesday 10 April 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 99,000 in standard form

    Answer: 9.9 × 104
  2. 2. Algebra

    Factorise: x² - 6x - 7

    Answer: (x + 1)(x - 7)
  3. 3. Geometry

    Hypotenuse = 29cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 21.55cm
  4. 4. Ratio

    Simplify: 18:9:12

    Answer: 6:3:4
  5. 5. Statistics

    The mean of 4 numbers is 22. If 3 of them are 21, 18, 34, what is the missing number?

    Answer: 15

Wednesday 11 April 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0018 in standard form

    Answer: 1.8 × 10-3
  2. 2. Algebra

    Factorise: x² + 2x - 24

    Answer: (x + 6)(x - 4)
  3. 3. Geometry

    Adjacent = 27cm, angle = 42°. Find opposite. Give your answer to 2 decimal places

    Answer: 24.31cm
  4. 4. Ratio

    Orange and purple marbles are in the ratio 4:13. What fraction of the marbles are purple?

    Answer: 13⁄17
  5. 5. Statistics

    Calculate the mean of: 45, 22, 17, 11, 14, 41, 39, 21

    Answer: 26.25

Thursday 12 April 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.002 in standard form

    Answer: 2 × 10-3
  2. 2. Algebra

    Factorise: x² - 8x - 20

    Answer: (x + 2)(x - 10)
  3. 3. Geometry

    Hypotenuse = 37cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 30.31cm
  4. 4. Ratio

    Red and blue beads are in the ratio 5:6. What fraction of the beads are red?

    Answer: 5⁄11
  5. 5. Statistics

    Calculate the mean of: 9, 5, 42, 24, 27, 11, 38. Give your answer to 2 decimal places

    Answer: 22.29

Friday 13 April 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00004 in standard form

    Answer: 4 × 10-5
  2. 2. Algebra

    Factorise: x² + 8x - 20

    Answer: (x + 10)(x - 2)
  3. 3. Geometry

    Adjacent = 25cm, angle = 53°. Find opposite. Give your answer to 2 decimal places

    Answer: 33.18cm
  4. 4. Ratio

    Divide 84 in the ratio 3:2:2

    Answer: 36, 24 and 24
  5. 5. Statistics

    The mean of 5 numbers is 37. If 4 of them are 44, 30, 50, 32, what is the missing number?

    Answer: 29