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Capstone Dec 17 - 23 25 questions
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Monday 17 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √128

    Answer: 8√2
  2. 2. Algebra

    Complete the square: x² + 2.8x

    Answer: (x + 1.4)² - 1.96
  3. 3. Geometry

    Find area of triangle: a = 24cm, b = 17cm, angle = 66°

    Answer: 186.4cm²
  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: 41, 51, 96, 23, 19, 36, 21, 89

    Answer: Mean = 47, Median = 41, Range = 77

Tuesday 18 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √242

    Answer: 11√2
  2. 2. Algebra

    Complete the square: x² + 4.8x

    Answer: (x + 2.4)² - 5.76
  3. 3. Geometry

    Find area of triangle: a = 29cm, b = 24cm, angle = 50°

    Answer: 266.6cm²
  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: 84, 45, 42, 57, 62, 74, 43, 74

    Answer: Mean = 60.1, Median = 62, Range = 42

Wednesday 19 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √243

    Answer: 9√3
  2. 2. Algebra

    Complete the square: x² + 2x

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

    Find area of triangle: a = 18cm, b = 27cm, angle = 61°

    Answer: 212.5cm²
  4. 4. Ratio

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

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

    Find the mean, median and range of: 92, 75, 40, 21, 42, 31, 74, 59, 87

    Answer: Mean = 57.9, Median = 59, Range = 71

Thursday 20 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √125

    Answer: 5√5
  2. 2. Algebra

    Complete the square: x² + 2.6x

    Answer: (x + 1.3)² - 1.69
  3. 3. Geometry

    Find area of triangle: a = 12cm, b = 13cm, angle = 69°

    Answer: 72.8cm²
  4. 4. Ratio

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

    Answer: 4:6:9
  5. 5. Statistics

    Find the mean, median and range of: 61, 13, 13, 88, 52, 75, 10

    Answer: Mean = 44.6, Median = 52, Range = 78

Friday 21 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √108

    Answer: 6√3
  2. 2. Algebra

    Complete the square: x² + 5x

    Answer: (x + 2.5)² - 6.25
  3. 3. Geometry

    Find area of triangle: a = 20cm, b = 21cm, angle = 67°

    Answer: 193.3cm²
  4. 4. Ratio

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

    Answer: 3:2:6
  5. 5. Statistics

    Find the mean, median and range of: 32, 47, 88, 58, 83, 54, 43, 29, 80

    Answer: Mean = 57.1, Median = 54, Range = 59