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Cornerstone Jul 12 - 18 25 questions
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Monday 12 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 2⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 6x - 18 = 72

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Divide 175 in the ratio 1:2:4

    Answer: 25, 50 and 100
  5. 5. Statistics

    Calculate the mean of: 23, 15, 44, 17, 28, 12, 40, 27

    Answer: 25.8

Tuesday 13 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄8 + 2⁄8

    Answer: 1⁄2
  2. 2. Algebra

    Solve: 5x + 7 = 42

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 8cm

    Answer: 12.04cm
  4. 4. Ratio

    Divide 203 in the ratio 4:2:1

    Answer: 116, 58 and 29
  5. 5. Statistics

    Find the mean of: 3, 4, 9, 6

    Answer: 5.5

Wednesday 14 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄8 + 2⁄8

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 2x + 14 = 28

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 8.6cm
  4. 4. Ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics

    Calculate the mean of: 43, 50, 30, 47, 46, 16, 26, 35

    Answer: 36.6

Thursday 15 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra

    Solve: 4x - 10 = 26

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 52 in the ratio 3:1

    Answer: 39 and 13
  5. 5. Statistics

    Find the mean of: 14, 13, 16, 15, 9

    Answer: 13.4

Friday 16 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Solve: 6x - 5 = 85

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 5cm

    Answer: 11.18cm
  4. 4. Ratio

    Share 133 in the ratio 3:4

    Answer: 57 and 76
  5. 5. Statistics

    Find the mean of: 11, 17, 17, 2, 15

    Answer: 12.4