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Lintel Jan 9 - 15 25 questions
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Monday 9 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00029 in standard form

    Answer: 2.9 × 10-4
  2. 2. Algebra

    Factorise: x² + 19x + 84

    Answer: (x + 12)(x + 7)
  3. 3. Geometry

    Hypotenuse = 17cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 9.99cm
  4. 4. Ratio

    Red and blue marbles are in the ratio 11:3. What fraction of the marbles are red?

    Answer: 11⁄14
  5. 5. Statistics

    Calculate the mean of: 22, 19, 10, 20, 31, 48

    Answer: 25

Tuesday 10 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.05 in standard form

    Answer: 5 × 10-2
  2. 2. Algebra

    Factorise: x² + 10x + 25

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

    Adjacent = 20cm, angle = 45°. Find opposite

    Answer: 20cm
  4. 4. Ratio

    Simplify: 15:15:9

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

    Calculate the mean of: 39, 16, 37, 21, 12, 22

    Answer: 24.5

Wednesday 11 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 740,000 in standard form

    Answer: 7.4 × 105
  2. 2. Algebra

    Factorise: x² - 2x - 80

    Answer: (x + 8)(x - 10)
  3. 3. Geometry

    Hypotenuse = 18cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 14.56cm
  4. 4. Ratio

    Black and white sweets are in the ratio 5:10. What fraction of the sweets are black?

    Answer: 1⁄3
  5. 5. Statistics

    The mean of 4 numbers is 37. If 3 of them are 18, 26, 34, what is the missing number?

    Answer: 70

Thursday 12 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0085 in standard form

    Answer: 8.5 × 10-3
  2. 2. Algebra

    Factorise: x² + 2x - 8

    Answer: (x + 4)(x - 2)
  3. 3. Geometry

    Adjacent = 27cm, angle = 50°. Find opposite. Give your answer to 2 decimal places

    Answer: 32.18cm
  4. 4. Ratio

    Black and white beads are in the ratio 6:8. What fraction of the beads are white?

    Answer: 4⁄7
  5. 5. Statistics

    The mean of 5 numbers is 38. If 4 of them are 40, 33, 23, 49, what is the missing number?

    Answer: 45

Friday 13 January 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 64,000,000 in standard form

    Answer: 6.4 × 107
  2. 2. Algebra

    Factorise: x² + x - 56

    Answer: (x + 8)(x - 7)
  3. 3. Geometry

    Hypotenuse = 32cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 18.35cm
  4. 4. Ratio

    Simplify: 12:18:6

    Answer: 2:3:1
  5. 5. Statistics

    Calculate the mean of: 49, 31, 15, 44, 43, 37

    Answer: 36.5