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Cornerstone Jan 31 - Feb 6 25 questions
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Monday 31 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 4⁄5

    Answer: 17⁄15
  2. 2. Algebra

    Solve: 8x - 19 = 45

    Answer: x = 8
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio

    Divide 136 in the ratio 3:3:2

    Answer: 51, 51 and 34
  5. 5. Statistics

    Find the mean of: 18, 4, 2, 9

    Answer: 8.25

Tuesday 1 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄8 + 1⁄3

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 3x + 8 = 44

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 11.66cm
  4. 4. Ratio

    Divide 152 in the ratio 2:3:3

    Answer: 38, 57 and 57
  5. 5. Statistics

    Calculate the mean of: 48, 26, 46, 16, 23, 17, 18

    Answer: 27.7

Wednesday 2 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra

    Solve: 6x + 6 = 24

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio

    Divide 100 in the ratio 2:2:1

    Answer: 40, 40 and 20
  5. 5. Statistics

    Calculate the mean of: 35, 41, 43, 36, 25, 29, 7, 16

    Answer: 29

Thursday 3 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄6 + 4⁄7

    Answer: 26⁄21
  2. 2. Algebra

    Solve: 4x - 6 = 34

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio

    Divide 171 in the ratio 3:2:4

    Answer: 57, 38 and 76
  5. 5. Statistics

    Find the mean of: 13, 17, 17, 9

    Answer: 14

Friday 4 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄6 + 2⁄3

    Answer: 1⁄1
  2. 2. Algebra

    Solve: 5x - 9 = 51

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 9cm

    Answer: 10.82cm
  4. 4. Ratio

    Share 91 in the ratio 3:4

    Answer: 39 and 52
  5. 5. Statistics

    Calculate the mean of: 39, 48, 13, 8, 9, 24, 11

    Answer: 21.7