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Cornerstone Aug 1 - 7 25 questions
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Monday 1 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 5⁄8

    Answer: 49⁄40
  2. 2. Algebra

    Solve: 2x + 6 = 30

    Answer: x = 12
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio

    Divide 270 in the ratio 4:4:1

    Answer: 120, 120 and 30
  5. 5. Statistics

    Find the mean of: 14, 5, 3, 10, 3

    Answer: 7

Tuesday 2 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra

    Solve: 7x + 7 = 91

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 8cm

    Answer: 11.31cm
  4. 4. Ratio

    Divide 133 in the ratio 3:2:2

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

    Find the mean of: 7, 5, 15, 20

    Answer: 11.75

Wednesday 3 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 4⁄6

    Answer: 26⁄21
  2. 2. Algebra

    Solve: 6x - 20 = 10

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio

    Divide 182 in the ratio 2:4:1

    Answer: 52, 104 and 26
  5. 5. Statistics

    Calculate the mean of: 41, 25, 37, 26, 20, 19, 50, 6

    Answer: 28

Thursday 4 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 7⁄8

    Answer: 81⁄56
  2. 2. Algebra

    Solve: 5x - 12 = 13

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics

    Find the mean of: 18, 14, 5, 14

    Answer: 12.75

Friday 5 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄11 + 1⁄11

    Answer: 3⁄11
  2. 2. Algebra

    Solve: 2x + 9 = 29

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 7cm

    Answer: 8.6cm
  4. 4. Ratio

    Share 20 in the ratio 3:1

    Answer: 15 and 5
  5. 5. Statistics

    Calculate the mean of: 13, 28, 24, 11, 6, 35

    Answer: 19.5