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Cornerstone Oct 27 - Nov 2 25 questions
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Monday 27 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄8 + 2⁄8

    Answer: 3⁄8
  2. 2. Algebra

    Solve: 7x - 8 = 27

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Share 76 in the ratio 3:1

    Answer: 57 and 19
  5. 5. Statistics

    Find the mean of: 18, 10, 11

    Answer: 13

Tuesday 28 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄11 + 6⁄11

    Answer: 8⁄11
  2. 2. Algebra

    Solve: 3x - 12 = 6

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Share 112 in the ratio 4:3

    Answer: 64 and 48
  5. 5. Statistics

    Find the mean of: 13, 15, 20, 15

    Answer: 15.75

Wednesday 29 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 3⁄8

    Answer: 53⁄56
  2. 2. Algebra

    Solve: 2x + 12 = 24

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 11cm

    Answer: 11.7cm
  4. 4. Ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics

    Calculate the mean of: 17, 29, 31, 28, 6, 35, 35

    Answer: 25.9

Thursday 30 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 4⁄8

    Answer: 13⁄10
  2. 2. Algebra

    Solve: 5x + 14 = 34

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 85 in the ratio 4:1

    Answer: 68 and 17
  5. 5. Statistics

    Calculate the mean of: 24, 12, 21, 23, 44, 41, 21

    Answer: 26.6

Friday 31 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄12 + 9⁄12

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 4x - 18 = -2

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 9cm

    Answer: 11.4cm
  4. 4. Ratio

    Share 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics

    Find the mean of: 11, 10, 5, 19

    Answer: 11.25