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Lintel Apr 18 - 24 25 questions
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Monday 18 April 2016

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.000027 in standard form

    Answer: 2.7 × 10-5
  2. 2. Algebra

    Factorise: x² + x - 42

    Answer: (x + 7)(x - 6)
  3. 3. Geometry

    Adjacent = 10cm, angle = 57°. Find opposite. Give your answer to 2 decimal places

    Answer: 15.4cm
  4. 4. Ratio

    Orange and purple counters are in the ratio 7:6. What fraction of the counters are orange?

    Answer: 7⁄13
  5. 5. Statistics

    The mean of 6 numbers is 28. If 5 of them are 18, 29, 25, 20, 37, what is the missing number?

    Answer: 39

Tuesday 19 April 2016

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 73,000 in standard form

    Answer: 7.3 × 104
  2. 2. Algebra

    Factorise: x² + 2x - 15

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

    Hypotenuse = 35cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 31.19cm
  4. 4. Ratio

    Orange and purple beads are in the ratio 4:12. What fraction of the beads are orange?

    Answer: 1⁄4
  5. 5. Statistics

    Calculate the mean of: 19, 18, 10, 14, 28, 47, 30, 12

    Answer: 22.25

Wednesday 20 April 2016

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0025 in standard form

    Answer: 2.5 × 10-3
  2. 2. Algebra

    Factorise: x² - 2x - 63

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

    Adjacent = 18cm, angle = 47°. Find opposite. Give your answer to 2 decimal places

    Answer: 19.3cm
  4. 4. Ratio

    Simplify: 20:24:20

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

    The mean of 4 numbers is 35. If 3 of them are 18, 31, 34, what is the missing number?

    Answer: 57

Thursday 21 April 2016

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 790,000,000 in standard form

    Answer: 7.9 × 108
  2. 2. Algebra

    Factorise: x² + 4x - 21

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

    Hypotenuse = 28cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 16.46cm
  4. 4. Ratio

    Simplify: 12:20:16

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

    Calculate the mean of: 43, 33, 27, 49, 32, 34. Give your answer to 2 decimal places

    Answer: 36.33

Friday 22 April 2016

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.000047 in standard form

    Answer: 4.7 × 10-5
  2. 2. Algebra

    Factorise: x² + 9x - 10

    Answer: (x + 10)(x - 1)
  3. 3. Geometry

    Adjacent = 30cm, angle = 49°. Find opposite. Give your answer to 2 decimal places

    Answer: 34.51cm
  4. 4. Ratio

    Simplify: 12:4:12

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

    Calculate the mean of: 28, 30, 26, 48, 47, 24, 28

    Answer: 33