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Cornerstone Jul 29 - Aug 4 25 questions
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Monday 29 July 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 2⁄3

    Answer: 23⁄21
  2. 2. Algebra

    Solve: 3x + 12 = 27

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio

    Share 133 in the ratio 4:3

    Answer: 76 and 57
  5. 5. Statistics

    Calculate the mean of: 27, 37, 48, 24, 36, 20, 28, 35

    Answer: 31.9

Tuesday 30 July 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄7 + 1⁄3

    Answer: 13⁄21
  2. 2. Algebra

    Solve: 2x + 12 = 18

    Answer: x = 3
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 10cm

    Answer: 11.66cm
  4. 4. Ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics

    Calculate the mean of: 31, 27, 7, 5, 13, 23, 29, 32

    Answer: 20.9

Wednesday 31 July 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄9 + 3⁄9

    Answer: 5⁄9
  2. 2. Algebra

    Solve: 5x - 20 = 50

    Answer: x = 14
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio

    Share 120 in the ratio 1:2

    Answer: 40 and 80
  5. 5. Statistics

    Find the mean of: 9, 4, 3

    Answer: 5.3333333333333

Thursday 1 August 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra

    Solve: 7x + 12 = 40

    Answer: x = 4
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Divide 108 in the ratio 4:2:3

    Answer: 48, 24 and 36
  5. 5. Statistics

    Calculate the mean of: 18, 41, 13, 20, 40, 21

    Answer: 25.5

Friday 2 August 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄7 + 1⁄7

    Answer: 5⁄7
  2. 2. Algebra

    Solve: 3x + 7 = 16

    Answer: x = 3
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 6cm

    Answer: 13.42cm
  4. 4. Ratio

    Divide 96 in the ratio 3:2:1

    Answer: 48, 32 and 16
  5. 5. Statistics

    Calculate the mean of: 34, 31, 46, 33, 30, 18

    Answer: 32