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Lintel May 21 - 27 25 questions
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Monday 21 May 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.000025 in standard form

    Answer: 2.5 × 10-5
  2. 2. Algebra

    Factorise: x² - 8x - 9

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

    Adjacent = 28cm, angle = 44°. Find opposite. Give your answer to 2 decimal places

    Answer: 27.04cm
  4. 4. Ratio

    Divide 184 in the ratio 2:1:1

    Answer: 92, 46 and 46
  5. 5. Statistics

    The mean of 6 numbers is 36. If 5 of them are 24, 43, 48, 27, 34, what is the missing number?

    Answer: 40

Tuesday 22 May 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 310,000 in standard form

    Answer: 3.1 × 105
  2. 2. Algebra

    Factorise: x² + 4x - 5

    Answer: (x + 5)(x - 1)
  3. 3. Geometry

    Hypotenuse = 34cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 30.81cm
  4. 4. Ratio

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

    Answer: 11⁄23
  5. 5. Statistics

    The mean of 5 numbers is 32. If 4 of them are 34, 38, 22, 42, what is the missing number?

    Answer: 24

Wednesday 23 May 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00024 in standard form

    Answer: 2.4 × 10-4
  2. 2. Algebra

    Factorise: x² - 2x - 24

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

    Adjacent = 25cm, angle = 37°. Find opposite. Give your answer to 2 decimal places

    Answer: 18.84cm
  4. 4. Ratio

    Simplify: 8:24:24

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

    Calculate the mean of: 40, 28, 40, 43, 14, 18

    Answer: 30.5

Thursday 24 May 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.09 in standard form

    Answer: 9 × 10-2
  2. 2. Algebra

    Factorise: x² + 4x - 45

    Answer: (x + 9)(x - 5)
  3. 3. Geometry

    Adjacent = 24cm, angle = 46°. Find opposite. Give your answer to 2 decimal places

    Answer: 24.85cm
  4. 4. Ratio

    £315.00 is shared between A and B in the ratio 3:4. How much does A receive?

    Answer: £135.00
  5. 5. Statistics

    The mean of 4 numbers is 26. If 3 of them are 31, 15, 42, what is the missing number?

    Answer: 16

Friday 25 May 2012

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 540,000 in standard form

    Answer: 5.4 × 105
  2. 2. Algebra

    Factorise: x² - 4x - 5

    Answer: (x + 1)(x - 5)
  3. 3. Geometry

    Hypotenuse = 33cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 14.47cm
  4. 4. Ratio

    Simplify the ratio 2kg : 450g

    Answer: 40:9
  5. 5. Statistics

    Calculate the mean of: 34, 47, 33, 7, 28, 46, 21. Give your answer to 2 decimal places

    Answer: 30.86