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Cornerstone Jul 28 - Aug 3 25 questions
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Monday 28 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 26 + 26

    Answer: 23
  2. 2. Algebra

    Solve: 4x + 8 = 56

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 12cm

    Answer: 16.28cm
  4. 4. Ratio

    Share 119 in the ratio 3:4

    Answer: 51 and 68
  5. 5. Statistics

    Calculate the mean of: 22, 36, 27, 41, 27, 47, 50, 42

    Answer: 36.5

Tuesday 29 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 47 + 35

    Answer: 4135
  2. 2. Algebra

    Solve: 4x - 9 = 51

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics

    Find the mean of: 6, 7, 12, 17, 18

    Answer: 12

Wednesday 30 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 13 + 67

    Answer: 2521
  2. 2. Algebra

    Solve: 8x - 18 = 46

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 15cm

    Answer: 18.6cm
  4. 4. Ratio

    Share 76 in the ratio 1:3

    Answer: 19 and 57
  5. 5. Statistics

    Find the mean of: 4, 18, 4, 17

    Answer: 10.75

Thursday 31 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 312 + 212

    Answer: 512
  2. 2. Algebra

    Solve: 6x + 4 = 40

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Share 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics

    Calculate the mean of: 8, 47, 40, 11, 8, 18, 34, 36

    Answer: 25.3

Friday 1 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 36 + 34

    Answer: 54
  2. 2. Algebra

    Solve: 2x - 18 = 12

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 180 in the ratio 1:2:3

    Answer: 30, 60 and 90
  5. 5. Statistics

    Find the mean of: 14, 20, 6

    Answer: 13.333333333333