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Cornerstone Jun 2 - 8 25 questions
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Monday 2 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 38 + 24

    Answer: 78
  2. 2. Algebra

    Solve: 3x + 11 = 26

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 6cm

    Answer: 7.81cm
  4. 4. Ratio

    Share 63 in the ratio 4:3

    Answer: 36 and 27
  5. 5. Statistics

    Find the mean of: 7, 12, 4, 14

    Answer: 9.25

Tuesday 3 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 27 + 27

    Answer: 47
  2. 2. Algebra

    Solve: 3x - 15 = 9

    Answer: x = 8
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Share 18 in the ratio 1:2

    Answer: 6 and 12
  5. 5. Statistics

    Calculate the mean of: 21, 9, 7, 33, 30, 35, 39

    Answer: 24.9

Wednesday 4 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 57 + 17

    Answer: 67
  2. 2. Algebra

    Solve: 8x - 15 = 25

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio

    Divide 91 in the ratio 2:2:3

    Answer: 26, 26 and 39
  5. 5. Statistics

    Find the mean of: 8, 19, 11, 9

    Answer: 11.75

Thursday 5 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 16 + 37

    Answer: 2542
  2. 2. Algebra

    Solve: 6x + 10 = 70

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 5cm

    Answer: 13cm
  4. 4. Ratio

    Divide 253 in the ratio 3:4:4

    Answer: 69, 92 and 92
  5. 5. Statistics

    Calculate the mean of: 36, 31, 12, 20, 38, 21

    Answer: 26.3

Friday 6 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 311 + 611

    Answer: 911
  2. 2. Algebra

    Solve: 6x + 12 = 60

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 171 in the ratio 3:2:4

    Answer: 57, 38 and 76
  5. 5. Statistics

    Calculate the mean of: 42, 50, 9, 49, 39, 32, 36, 39

    Answer: 37