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Cornerstone Mar 10 - 16 25 questions
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Monday 10 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄6 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra

    Solve: 6x + 14 = 74

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Divide 126 in the ratio 3:2:4

    Answer: 42, 28 and 56
  5. 5. Statistics

    Find the mean of: 15, 12, 15, 14

    Answer: 14

Tuesday 11 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄10 + 2⁄10

    Answer: 1⁄2
  2. 2. Algebra

    Solve: 7x - 14 = 14

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 16.28cm
  4. 4. Ratio

    Divide 70 in the ratio 2:2:1

    Answer: 28, 28 and 14
  5. 5. Statistics

    Calculate the mean of: 11, 35, 16, 9, 18, 36, 9, 45

    Answer: 22.4

Wednesday 12 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄6 + 1⁄5

    Answer: 11⁄30
  2. 2. Algebra

    Solve: 3x - 12 = 18

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 80 in the ratio 3:2:3

    Answer: 30, 20 and 30
  5. 5. Statistics

    Calculate the mean of: 16, 23, 32, 14, 36, 30, 49

    Answer: 28.6

Thursday 13 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄10 + 7⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 5x + 5 = 40

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 10cm

    Answer: 12.81cm
  4. 4. Ratio

    Divide 189 in the ratio 2:3:2

    Answer: 54, 81 and 54
  5. 5. Statistics

    Find the mean of: 16, 2, 20, 18

    Answer: 14

Friday 14 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄10 + 6⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 5x + 10 = 70

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 13cm

    Answer: 14.32cm
  4. 4. Ratio

    Share 66 in the ratio 2:1

    Answer: 44 and 22
  5. 5. Statistics

    Calculate the mean of: 44, 7, 40, 32, 11, 14, 46

    Answer: 27.7