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Capstone Jan 9 - 15 25 questions
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Monday 9 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √75

    Answer: 5√3
  2. 2. Algebra

    Complete the square: x² + 5x

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

    Find area of triangle: a = 23cm, b = 13cm, angle = 49°

    Answer: 112.8cm²
  4. 4. Ratio

    a:b is 4:3 and b:c is 1:2. Find a:b:c.

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

    Find the mean, median and range of: 97, 72, 46, 24, 36, 67, 90

    Answer: Mean = 61.7, Median = 67, Range = 73

Tuesday 10 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √125

    Answer: 5√5
  2. 2. Algebra

    Complete the square: x² + 4.8x

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

    Find area of triangle: a = 30cm, b = 15cm, angle = 51°

    Answer: 174.9cm²
  4. 4. Ratio

    a:b is 1:2 and b:c is 4:3. Find a:b:c.

    Answer: 2:4:3
  5. 5. Statistics

    Find the mean, median and range of: 13, 40, 74, 56, 24, 11, 48

    Answer: Mean = 38, Median = 40, Range = 63

Wednesday 11 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √108

    Answer: 6√3
  2. 2. Algebra

    Complete the square: x² + 3x

    Answer: (x + 1.5)² - 2.25
  3. 3. Geometry

    Find area of triangle: a = 12cm, b = 20cm, angle = 69°

    Answer: 112cm²
  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: 33, 96, 43, 63, 15, 25, 41, 83

    Answer: Mean = 49.9, Median = 43, Range = 81

Thursday 12 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √192

    Answer: 8√3
  2. 2. Algebra

    Complete the square: x² + 4.6x

    Answer: (x + 2.3)² - 5.29
  3. 3. Geometry

    Find area of triangle: a = 13cm, b = 18cm, angle = 43°

    Answer: 79.8cm²
  4. 4. Ratio

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

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

    Find the mean, median and range of: 99, 100, 96, 39, 60, 38, 59, 43

    Answer: Mean = 66.8, Median = 60, Range = 62

Friday 13 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: √147

    Answer: 7√3
  2. 2. Algebra

    Complete the square: x² + 3.8x

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

    Find area of triangle: a = 13cm, b = 27cm, angle = 80°

    Answer: 172.8cm²
  4. 4. Ratio

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

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

    Find the mean, median and range of: 20, 30, 68, 89, 53, 60, 99

    Answer: Mean = 59.9, Median = 60, Range = 79