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Cornerstone Jun 16 - 22 25 questions
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Monday 16 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 26 + 45

    Answer: 1715
  2. 2. Algebra

    Solve: 2x - 10 = 12

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Share 40 in the ratio 1:3

    Answer: 10 and 30
  5. 5. Statistics

    Calculate the mean of: 43, 18, 24, 26, 24, 11, 14

    Answer: 22.9

Tuesday 17 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 611 + 311

    Answer: 911
  2. 2. Algebra

    Solve: 4x + 14 = 46

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio

    Share 114 in the ratio 1:2

    Answer: 38 and 76
  5. 5. Statistics

    Find the mean of: 8, 6, 3, 5

    Answer: 5.5

Wednesday 18 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 912 + 212

    Answer: 1112
  2. 2. Algebra

    Solve: 3x + 11 = 26

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 10cm

    Answer: 11.66cm
  4. 4. Ratio

    Share 40 in the ratio 2:3

    Answer: 16 and 24
  5. 5. Statistics

    Find the mean of: 6, 6, 19, 7

    Answer: 9.5

Thursday 19 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 48 + 14

    Answer: 34
  2. 2. Algebra

    Solve: 4x - 5 = 35

    Answer: x = 10
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio

    Share 91 in the ratio 4:3

    Answer: 52 and 39
  5. 5. Statistics

    Calculate the mean of: 41, 25, 24, 24, 5, 39, 7

    Answer: 23.6

Friday 20 June 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 28 + 48

    Answer: 34
  2. 2. Algebra

    Solve: 3x - 10 = 23

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 11cm

    Answer: 14.21cm
  4. 4. Ratio

    Share 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics

    Find the mean of: 18, 12, 20, 7, 18

    Answer: 15