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Cornerstone Oct 25 - 31 25 questions
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Monday 25 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄5 + 2⁄6

    Answer: 8⁄15
  2. 2. Algebra

    Solve: 7x - 18 = 87

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 12cm

    Answer: 14.42cm
  4. 4. Ratio

    Divide 162 in the ratio 1:4:4

    Answer: 18, 72 and 72
  5. 5. Statistics

    Find the mean of: 11, 6, 16

    Answer: 11

Tuesday 26 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄9 + 4⁄9

    Answer: 8⁄9
  2. 2. Algebra

    Solve: 7x - 19 = 37

    Answer: x = 8
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio

    Divide 135 in the ratio 4:1:4

    Answer: 60, 15 and 60
  5. 5. Statistics

    Find the mean of: 10, 2, 19, 11

    Answer: 10.5

Wednesday 27 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄6 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 4x + 8 = 24

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio

    Divide 175 in the ratio 2:4:1

    Answer: 50, 100 and 25
  5. 5. Statistics

    Calculate the mean of: 14, 31, 31, 43, 15, 29, 34, 14

    Answer: 26.4

Thursday 28 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄6 + 5⁄8

    Answer: 35⁄24
  2. 2. Algebra

    Solve: 7x + 12 = 96

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 13cm

    Answer: 16.4cm
  4. 4. Ratio

    Divide 168 in the ratio 1:1:2

    Answer: 42, 42 and 84
  5. 5. Statistics

    Calculate the mean of: 23, 35, 37, 35, 47, 13

    Answer: 31.7

Friday 29 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄8 + 1⁄8

    Answer: 1⁄2
  2. 2. Algebra

    Solve: 5x - 8 = 62

    Answer: x = 14
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Divide 261 in the ratio 3:4:2

    Answer: 87, 116 and 58
  5. 5. Statistics

    Find the mean of: 20, 8, 10, 19, 6

    Answer: 12.6