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Cornerstone Nov 8 - 14 25 questions
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Monday 8 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 7x - 14 = 70

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 10cm

    Answer: 11.66cm
  4. 4. Ratio

    Share 48 in the ratio 2:1

    Answer: 32 and 16
  5. 5. Statistics

    Find the mean of: 13, 10, 9

    Answer: 10.666666666667

Tuesday 9 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 6⁄8

    Answer: 31⁄20
  2. 2. Algebra

    Solve: 5x + 15 = 70

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Share 48 in the ratio 1:3

    Answer: 12 and 36
  5. 5. Statistics

    Calculate the mean of: 29, 31, 44, 10, 31, 6, 41

    Answer: 27.4

Wednesday 10 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄7 + 1⁄8

    Answer: 47⁄56
  2. 2. Algebra

    Solve: 6x + 13 = 85

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 10cm

    Answer: 14.87cm
  4. 4. Ratio

    Share 60 in the ratio 2:1

    Answer: 40 and 20
  5. 5. Statistics

    Calculate the mean of: 32, 34, 39, 45, 17, 7

    Answer: 29

Thursday 11 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra

    Solve: 3x - 6 = 36

    Answer: x = 14
  3. 3. Geometry

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

    Answer: 12.73cm
  4. 4. Ratio

    Share 80 in the ratio 4:1

    Answer: 64 and 16
  5. 5. Statistics

    Find the mean of: 13, 13, 20, 10, 10

    Answer: 13.2

Friday 12 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄8 + 1⁄4

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 5x - 15 = 50

    Answer: x = 13
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 5cm

    Answer: 13cm
  4. 4. Ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics

    Find the mean of: 6, 5, 16, 11, 12

    Answer: 10