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Cornerstone Aug 18 - 24 25 questions
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Monday 18 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 25 + 56

    Answer: 3730
  2. 2. Algebra

    Solve: 7x - 10 = 60

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 13cm

    Answer: 13.6cm
  4. 4. Ratio

    Divide 145 in the ratio 1:2:2

    Answer: 29, 58 and 58
  5. 5. Statistics

    Find the mean of: 16, 2, 18

    Answer: 12

Tuesday 19 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 57 + 17

    Answer: 67
  2. 2. Algebra

    Solve: 2x + 11 = 17

    Answer: x = 3
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Divide 112 in the ratio 3:4:1

    Answer: 42, 56 and 14
  5. 5. Statistics

    Calculate the mean of: 8, 30, 34, 7, 34, 48, 10, 22

    Answer: 24.1

Wednesday 20 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 16 + 14

    Answer: 512
  2. 2. Algebra

    Solve: 3x + 4 = 13

    Answer: x = 3
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 6cm

    Answer: 12.53cm
  4. 4. Ratio

    Divide 136 in the ratio 1:1:2

    Answer: 34, 34 and 68
  5. 5. Statistics

    Find the mean of: 14, 17, 14

    Answer: 15

Thursday 21 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 27 + 37

    Answer: 57
  2. 2. Algebra

    Solve: 5x - 20 = 40

    Answer: x = 12
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Divide 209 in the ratio 4:3:4

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

    Calculate the mean of: 34, 17, 32, 49, 19, 45, 44, 15

    Answer: 31.9

Friday 22 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 58 + 47

    Answer: 6756
  2. 2. Algebra

    Solve: 4x - 6 = 14

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 15.62cm
  4. 4. Ratio

    Divide 76 in the ratio 2:1:1

    Answer: 38, 19 and 19
  5. 5. Statistics

    Calculate the mean of: 7, 39, 27, 43, 50, 50, 31, 43

    Answer: 36.3