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Cornerstone Jul 6 - 12 25 questions
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Monday 6 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄9 + 4⁄9

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 7x + 9 = 86

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 14.87cm
  4. 4. Ratio

    Divide 130 in the ratio 3:1:1

    Answer: 78, 26 and 26
  5. 5. Statistics

    Find the mean of: 7, 18, 8, 2, 2

    Answer: 7.4

Tuesday 7 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 4⁄7

    Answer: 48⁄35
  2. 2. Algebra

    Solve: 7x - 16 = 61

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Divide 120 in the ratio 1:2:1

    Answer: 30, 60 and 30
  5. 5. Statistics

    Calculate the mean of: 7, 17, 48, 30, 40, 38, 16

    Answer: 28

Wednesday 8 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄6 + 7⁄8

    Answer: 37⁄24
  2. 2. Algebra

    Solve: 2x - 12 = 8

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 231 in the ratio 4:3:4

    Answer: 84, 63 and 84
  5. 5. Statistics

    Calculate the mean of: 34, 39, 16, 21, 24, 6, 41, 49

    Answer: 28.8

Thursday 9 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra

    Solve: 2x + 9 = 21

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 4cm

    Answer: 6.4cm
  4. 4. Ratio

    Divide 72 in the ratio 1:2:3

    Answer: 12, 24 and 36
  5. 5. Statistics

    Find the mean of: 6, 5, 11, 3, 2

    Answer: 5.4

Friday 10 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄8 + 6⁄8

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 6x + 10 = 34

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 14.56cm
  4. 4. Ratio

    Divide 189 in the ratio 1:4:4

    Answer: 21, 84 and 84
  5. 5. Statistics

    Find the mean of: 4, 5, 16, 7

    Answer: 8