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Cornerstone Nov 17 - 23 25 questions
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Monday 17 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 47 + 27

    Answer: 67
  2. 2. Algebra

    Solve: 7x - 5 = 30

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 14cm

    Answer: 16.12cm
  4. 4. Ratio

    Share 80 in the ratio 1:3

    Answer: 20 and 60
  5. 5. Statistics

    Calculate the mean of: 18, 49, 46, 18, 27, 24

    Answer: 30.3

Tuesday 18 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 210 + 710

    Answer: 910
  2. 2. Algebra

    Solve: 5x - 17 = 23

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics

    Calculate the mean of: 11, 21, 7, 26, 48, 6, 6, 11

    Answer: 17

Wednesday 19 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 14 + 36

    Answer: 34
  2. 2. Algebra

    Solve: 6x + 9 = 81

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio

    Share 27 in the ratio 2:1

    Answer: 18 and 9
  5. 5. Statistics

    Find the mean of: 13, 19, 5

    Answer: 12.333333333333

Thursday 20 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 110 + 110

    Answer: 15
  2. 2. Algebra

    Solve: 4x + 13 = 57

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio

    Share 39 in the ratio 1:2

    Answer: 13 and 26
  5. 5. Statistics

    Calculate the mean of: 35, 23, 35, 8, 13, 7, 43, 7

    Answer: 21.4

Friday 21 November 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 25 + 46

    Answer: 1615
  2. 2. Algebra

    Solve: 8x - 16 = 80

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio

    Share 120 in the ratio 1:2

    Answer: 40 and 80
  5. 5. Statistics

    Find the mean of: 3, 12, 18, 17, 6

    Answer: 11.2