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Lintel Apr 19 - 25 25 questions
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Monday 19 April 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.071 in standard form

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

    Factorise: x² + 4x - 60

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

    Hypotenuse = 15cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 7.73cm
  4. 4. Ratio

    Red and blue marbles are in the ratio 10:7. What fraction of the marbles are blue?

    Answer: 7⁄17
  5. 5. Statistics

    Calculate the mean of: 43, 18, 43, 20, 31, 23. Give your answer to 2 decimal places

    Answer: 29.67

Tuesday 20 April 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 49,000 in standard form

    Answer: 4.9 × 104
  2. 2. Algebra

    Factorise: x² + 6x - 16

    Answer: (x + 8)(x - 2)
  3. 3. Geometry

    Adjacent = 28cm, angle = 32°. Find opposite. Give your answer to 2 decimal places

    Answer: 17.5cm
  4. 4. Ratio

    Divide 96 in the ratio 4:1:1

    Answer: 64, 16 and 16
  5. 5. Statistics

    The mean of 4 numbers is 26. If 3 of them are 26, 42, 19, what is the missing number?

    Answer: 17

Wednesday 21 April 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0005 in standard form

    Answer: 5 × 10-4
  2. 2. Algebra

    Factorise: x² - 16x + 63

    Answer: (x - 7)(x - 9)
  3. 3. Geometry

    Hypotenuse = 38cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 33.86cm
  4. 4. Ratio

    Red and blue counters are in the ratio 14:10. What fraction of the counters are red?

    Answer: 7⁄12
  5. 5. Statistics

    Calculate the mean of: 15, 21, 31, 11, 45, 28, 18, 38. Give your answer to 2 decimal places

    Answer: 25.88

Thursday 22 April 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 55,000,000 in standard form

    Answer: 5.5 × 107
  2. 2. Algebra

    Factorise: x² - 2x - 3

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

    Adjacent = 10cm, angle = 55°. Find opposite. Give your answer to 2 decimal places

    Answer: 14.28cm
  4. 4. Ratio

    Simplify: 6:12:15

    Answer: 2:4:5
  5. 5. Statistics

    Calculate the mean of: 6, 29, 32, 10, 8, 7, 26, 42

    Answer: 20

Friday 23 April 2010

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.000029 in standard form

    Answer: 2.9 × 10-5
  2. 2. Algebra

    Factorise: x² - 3x - 10

    Answer: (x + 2)(x - 5)
  3. 3. Geometry

    Hypotenuse = 15cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 13.12cm
  4. 4. Ratio

    Simplify: 8:16:8

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

    The mean of 5 numbers is 24. If 4 of them are 27, 35, 26, 15, what is the missing number?

    Answer: 17