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Cornerstone Aug 11 - 17 25 questions
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Monday 11 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 710 + 210

    Answer: 910
  2. 2. Algebra

    Solve: 6x + 11 = 65

    Answer: x = 9
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Share 21 in the ratio 2:1

    Answer: 14 and 7
  5. 5. Statistics

    Find the mean of: 9, 5, 3, 4, 10

    Answer: 6.2

Tuesday 12 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 46 + 23

    Answer: 43
  2. 2. Algebra

    Solve: 6x + 12 = 60

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 13cm

    Answer: 15.26cm
  4. 4. Ratio

    Share 56 in the ratio 1:3

    Answer: 14 and 42
  5. 5. Statistics

    Find the mean of: 9, 3, 17, 2, 17

    Answer: 9.6

Wednesday 13 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 510 + 210

    Answer: 710
  2. 2. Algebra

    Solve: 6x - 18 = 54

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Share 112 in the ratio 3:4

    Answer: 48 and 64
  5. 5. Statistics

    Calculate the mean of: 22, 38, 50, 24, 36, 37, 36, 17

    Answer: 32.5

Thursday 14 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 58 + 18

    Answer: 34
  2. 2. Algebra

    Solve: 6x - 5 = 43

    Answer: x = 8
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio

    Divide 168 in the ratio 2:4:1

    Answer: 48, 96 and 24
  5. 5. Statistics

    Find the mean of: 2, 9, 19, 9

    Answer: 9.75

Friday 15 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 57 + 25

    Answer: 3935
  2. 2. Algebra

    Solve: 6x + 6 = 24

    Answer: x = 3
  3. 3. Geometry

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

    Answer: 15.62cm
  4. 4. Ratio

    Divide 200 in the ratio 1:3:4

    Answer: 25, 75 and 100
  5. 5. Statistics

    Calculate the mean of: 50, 38, 50, 17, 42, 20, 42, 32

    Answer: 36.4