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Cornerstone Nov 3 - 9 25 questions
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Monday 3 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄8 + 3⁄8

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 5x + 7 = 27

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 12cm

    Answer: 15.62cm
  4. 4. Ratio

    Share 45 in the ratio 1:2

    Answer: 15 and 30
  5. 5. Statistics

    Find the mean of: 4, 2, 8

    Answer: 4.6666666666667

Tuesday 4 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 4x + 5 = 17

    Answer: x = 3
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 14cm

    Answer: 17.2cm
  4. 4. Ratio

    Divide 147 in the ratio 3:1:3

    Answer: 63, 21 and 63
  5. 5. Statistics

    Calculate the mean of: 13, 45, 14, 35, 46, 46

    Answer: 33.2

Wednesday 5 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra

    Solve: 3x - 12 = 9

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 96 in the ratio 1:1:2

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

    Find the mean of: 5, 2, 20, 8, 2

    Answer: 7.4

Thursday 6 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄9 + 2⁄9

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 2x - 7 = 17

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 8cm

    Answer: 8.54cm
  4. 4. Ratio

    Divide 270 in the ratio 3:3:4

    Answer: 81, 81 and 108
  5. 5. Statistics

    Find the mean of: 10, 11, 17, 7

    Answer: 11.25

Friday 7 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄4 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra

    Solve: 2x + 12 = 28

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 50 in the ratio 3:1:1

    Answer: 30, 10 and 10
  5. 5. Statistics

    Calculate the mean of: 22, 8, 50, 42, 22, 35, 14

    Answer: 27.6