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Lintel Feb 28 - Mar 6 25 questions
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Monday 28 February 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 630,000 in standard form

    Answer: 6.3 × 105
  2. 2. Algebra

    Factorise: x² + 8x - 9

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

    Adjacent = 13cm, angle = 58°. Find opposite. Give your answer to 2 decimal places

    Answer: 20.8cm
  4. 4. Ratio

    Orange and purple counters are in the ratio 11:12. What fraction of the counters are purple?

    Answer: 12⁄23
  5. 5. Statistics

    The mean of 5 numbers is 30. If 4 of them are 42, 20, 22, 36, what is the missing number?

    Answer: 30

Tuesday 1 March 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 880,000 in standard form

    Answer: 8.8 × 105
  2. 2. Algebra

    Factorise: x² + 7x - 30

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

    Hypotenuse = 25cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 20.48cm
  4. 4. Ratio

    Divide 136 in the ratio 1:3:4

    Answer: 17, 51 and 68
  5. 5. Statistics

    Calculate the mean of: 13, 11, 36, 13, 26, 23, 26. Give your answer to 2 decimal places

    Answer: 21.14

Wednesday 2 March 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.009 in standard form

    Answer: 9 × 10-3
  2. 2. Algebra

    Factorise: x² + 2x - 63

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

    Adjacent = 14cm, angle = 34°. Find opposite. Give your answer to 2 decimal places

    Answer: 9.44cm
  4. 4. Ratio

    Simplify: 15:15:6

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

    Calculate the mean of: 27, 10, 24, 22, 10, 18, 35, 13. Give your answer to 2 decimal places

    Answer: 19.88

Thursday 3 March 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 54,000 in standard form

    Answer: 5.4 × 104
  2. 2. Algebra

    Factorise: x² + 12x + 11

    Answer: (x + 11)(x + 1)
  3. 3. Geometry

    Hypotenuse = 16cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 10.28cm
  4. 4. Ratio

    Simplify: 6:15:18

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

    The mean of 5 numbers is 36. If 4 of them are 36, 28, 50, 46, what is the missing number?

    Answer: 20

Friday 4 March 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 26,000,000 in standard form

    Answer: 2.6 × 107
  2. 2. Algebra

    Factorise: x² + 11x + 28

    Answer: (x + 7)(x + 4)
  3. 3. Geometry

    Hypotenuse = 27cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 22.38cm
  4. 4. Ratio

    Red, blue and green beads are in the ratio 8:7:9. What fraction of the beads are red?

    Answer: 1⁄3
  5. 5. Statistics

    Calculate the mean of: 30, 7, 31, 9, 26, 49, 10. Give your answer to 2 decimal places

    Answer: 23.14