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Capstone May 24 - 30 25 questions
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Monday 24 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √243

    Answer: 9√3
  2. 2. Algebra

    Complete the square: x² + 2.2x

    Answer: (x + 1.1)² - 1.21
  3. 3. Geometry

    Find area of triangle: a = 24cm, b = 21cm, angle = 52°

    Answer: 198.6cm²
  4. 4. Ratio

    a:b is 1:2 and b:c is 2:5. Find a:b:c.

    Answer: 2:4:10
  5. 5. Statistics

    Find the mean, median and range of: 19, 90, 85, 26, 25, 27, 33

    Answer: Mean = 43.6, Median = 27, Range = 71

Tuesday 25 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √128

    Answer: 8√2
  2. 2. Algebra

    Complete the square: x² + 5.2x

    Answer: (x + 2.6)² - 6.76
  3. 3. Geometry

    Find area of triangle: a = 17cm, b = 17cm, angle = 51°

    Answer: 112.3cm²
  4. 4. Ratio

    a:b is 3:2 and b:c is 2:5. Find a:b:c.

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

    Find the mean, median and range of: 50, 75, 49, 49, 55, 75, 55

    Answer: Mean = 58.3, Median = 55, Range = 26

Wednesday 26 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √147

    Answer: 7√3
  2. 2. Algebra

    Complete the square: x² + 5.8x

    Answer: (x + 2.9)² - 8.41
  3. 3. Geometry

    Find area of triangle: a = 14cm, b = 15cm, angle = 46°

    Answer: 75.5cm²
  4. 4. Ratio

    a:b is 1:2 and b:c is 2:3. Find a:b:c.

    Answer: 2:4:6
  5. 5. Statistics

    Find the mean, median and range of: 88, 87, 12, 43, 18, 83, 67, 48, 78

    Answer: Mean = 58.2, Median = 67, Range = 76

Thursday 27 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √75

    Answer: 5√3
  2. 2. Algebra

    Complete the square: x² + 2x

    Answer: (x + 1)² - 1
  3. 3. Geometry

    Find area of triangle: a = 19cm, b = 13cm, angle = 75°

    Answer: 119.3cm²
  4. 4. Ratio

    a:b is 3:4 and b:c is 2:5. Find a:b:c.

    Answer: 3:4:10
  5. 5. Statistics

    Find the mean, median and range of: 54, 93, 77, 34, 87, 37, 19, 90

    Answer: Mean = 61.4, Median = 77, Range = 74

Friday 28 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √108

    Answer: 6√3
  2. 2. Algebra

    Complete the square: x² + 2.4x

    Answer: (x + 1.2)² - 1.44
  3. 3. Geometry

    Find area of triangle: a = 21cm, b = 18cm, angle = 46°

    Answer: 136cm²
  4. 4. Ratio

    a:b is 3:4 and b:c is 3:4. Find a:b:c.

    Answer: 9:12:16
  5. 5. Statistics

    Find the mean, median and range of: 29, 47, 70, 66, 52, 95, 40, 63, 58

    Answer: Mean = 57.8, Median = 58, Range = 66