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Capstone Sep 26 - Oct 2 25 questions
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Monday 26 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √243

    Answer: 9√3
  2. 2. Algebra

    Complete the square: x² + 4x

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

    Find area of triangle: a = 13cm, b = 30cm, angle = 61°

    Answer: 170.6cm²
  4. 4. Ratio

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

    Answer: 9:6:8
  5. 5. Statistics

    Find the mean, median and range of: 47, 18, 23, 71, 36, 75, 41, 69, 95

    Answer: Mean = 52.8, Median = 47, Range = 77

Tuesday 27 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √242

    Answer: 11√2
  2. 2. Algebra

    Complete the square: x² + 3.8x

    Answer: (x + 1.9)² - 3.61
  3. 3. Geometry

    Find area of triangle: a = 12cm, b = 22cm, angle = 45°

    Answer: 93.3cm²
  4. 4. Ratio

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

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

    Find the mean, median and range of: 71, 45, 85, 96, 35, 30, 67, 50

    Answer: Mean = 59.9, Median = 67, Range = 66

Wednesday 28 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √162

    Answer: 9√2
  2. 2. Algebra

    Complete the square: x² + 2x

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

    Find area of triangle: a = 30cm, b = 14cm, angle = 76°

    Answer: 203.8cm²
  4. 4. Ratio

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

    Answer: 3:4:6
  5. 5. Statistics

    Find the mean, median and range of: 14, 75, 84, 50, 96, 89, 38, 99

    Answer: Mean = 68.1, Median = 84, Range = 85

Thursday 29 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √147

    Answer: 7√3
  2. 2. Algebra

    Complete the square: x² + 5.6x

    Answer: (x + 2.8)² - 7.84
  3. 3. Geometry

    Find area of triangle: a = 15cm, b = 16cm, angle = 56°

    Answer: 99.5cm²
  4. 4. Ratio

    a:b is 1:2 and b:c is 3:5. Find a:b:c.

    Answer: 6:12:20
  5. 5. Statistics

    Find the mean, median and range of: 28, 21, 17, 57, 54, 18, 92, 75

    Answer: Mean = 45.3, Median = 54, Range = 75

Friday 30 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √363

    Answer: 11√3
  2. 2. Algebra

    Complete the square: x² + 5.2x

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

    Find area of triangle: a = 18cm, b = 30cm, angle = 58°

    Answer: 229cm²
  4. 4. Ratio

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

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

    Find the mean, median and range of: 24, 73, 31, 56, 91, 31, 74, 97

    Answer: Mean = 59.6, Median = 73, Range = 73