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Cornerstone Jan 27 - Feb 2 25 questions
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Monday 27 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄5 + 5⁄6

    Answer: 31⁄30
  2. 2. Algebra

    Solve: 3x + 4 = 25

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 5.66cm
  4. 4. Ratio

    Divide 100 in the ratio 3:4:3

    Answer: 30, 40 and 30
  5. 5. Statistics

    Find the mean of: 17, 3, 16, 15

    Answer: 12.75

Tuesday 28 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄7 + 1⁄4

    Answer: 11⁄28
  2. 2. Algebra

    Solve: 3x + 7 = 37

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 6cm

    Answer: 7.21cm
  4. 4. Ratio

    Divide 126 in the ratio 1:2:3

    Answer: 21, 42 and 63
  5. 5. Statistics

    Find the mean of: 10, 4, 18, 2, 4

    Answer: 7.6

Wednesday 29 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄12 + 6⁄12

    Answer: 7⁄12
  2. 2. Algebra

    Solve: 8x - 17 = 23

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Divide 168 in the ratio 4:1:1

    Answer: 112, 28 and 28
  5. 5. Statistics

    Calculate the mean of: 50, 10, 21, 9, 6, 34, 31

    Answer: 23

Thursday 30 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 8x - 12 = 68

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio

    Divide 152 in the ratio 1:3:4

    Answer: 19, 57 and 76
  5. 5. Statistics

    Calculate the mean of: 22, 8, 41, 44, 46, 43, 37, 47

    Answer: 36

Friday 31 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 2⁄3

    Answer: 26⁄21
  2. 2. Algebra

    Solve: 6x + 8 = 74

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Divide 176 in the ratio 1:3:4

    Answer: 22, 66 and 88
  5. 5. Statistics

    Find the mean of: 6, 15, 11, 6

    Answer: 9.5