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Cornerstone Oct 5 - 11 25 questions
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Monday 5 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄7 + 7⁄8

    Answer: 97⁄56
  2. 2. Algebra

    Solve: 4x - 13 = 43

    Answer: x = 14
  3. 3. Geometry

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

    Answer: 16.97cm
  4. 4. Ratio

    Divide 136 in the ratio 2:1:1

    Answer: 68, 34 and 34
  5. 5. Statistics

    Calculate the mean of: 11, 30, 5, 33, 7, 48, 31, 45

    Answer: 26.3

Tuesday 6 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄6 + 2⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 6x - 17 = 37

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 261 in the ratio 4:4:1

    Answer: 116, 116 and 29
  5. 5. Statistics

    Calculate the mean of: 9, 23, 33, 39, 33, 26, 28, 21

    Answer: 26.5

Wednesday 7 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 1⁄6

    Answer: 29⁄30
  2. 2. Algebra

    Solve: 3x + 3 = 33

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 14cm

    Answer: 14.56cm
  4. 4. Ratio

    Divide 104 in the ratio 2:1:1

    Answer: 52, 26 and 26
  5. 5. Statistics

    Find the mean of: 12, 10, 6, 18, 7

    Answer: 10.6

Thursday 8 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄7 + 3⁄4

    Answer: 45⁄28
  2. 2. Algebra

    Solve: 5x + 11 = 71

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 11cm

    Answer: 12.53cm
  4. 4. Ratio

    Divide 162 in the ratio 3:4:2

    Answer: 54, 72 and 36
  5. 5. Statistics

    Find the mean of: 11, 11, 7

    Answer: 9.6666666666667

Friday 9 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄9 + 1⁄9

    Answer: 5⁄9
  2. 2. Algebra

    Solve: 5x - 14 = 16

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Divide 84 in the ratio 2:3:1

    Answer: 28, 42 and 14
  5. 5. Statistics

    Calculate the mean of: 9, 9, 26, 6, 41, 19, 24

    Answer: 19.1