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Cornerstone Jan 24 - 30 25 questions
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Monday 24 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄8 + 2⁄8

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 8x - 17 = 71

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Divide 152 in the ratio 3:2:3

    Answer: 57, 38 and 57
  5. 5. Statistics

    Find the mean of: 9, 5, 2, 15, 16

    Answer: 9.4

Tuesday 25 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra

    Solve: 6x + 9 = 63

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 15.56cm
  4. 4. Ratio

    Divide 90 in the ratio 4:2:3

    Answer: 40, 20 and 30
  5. 5. Statistics

    Calculate the mean of: 14, 32, 29, 42, 6, 39, 8, 50

    Answer: 27.5

Wednesday 26 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 5x + 15 = 50

    Answer: x = 7
  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 2:4:3

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

    Calculate the mean of: 11, 13, 33, 7, 10, 5

    Answer: 13.2

Thursday 27 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄7 + 1⁄5

    Answer: 17⁄35
  2. 2. Algebra

    Solve: 5x - 15 = 25

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 9cm

    Answer: 13.45cm
  4. 4. Ratio

    Divide 102 in the ratio 1:2:3

    Answer: 17, 34 and 51
  5. 5. Statistics

    Find the mean of: 19, 10, 16, 4, 3

    Answer: 10.4

Friday 28 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄8 + 1⁄4

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 4x - 7 = 49

    Answer: x = 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 13cm

    Answer: 17.69cm
  4. 4. Ratio

    Divide 210 in the ratio 3:1:3

    Answer: 90, 30 and 90
  5. 5. Statistics

    Find the mean of: 18, 6, 17

    Answer: 13.666666666667