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Cornerstone Jul 13 - 19 25 questions
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Monday 13 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄6 + 3⁄7

    Answer: 13⁄14
  2. 2. Algebra

    Solve: 6x + 3 = 27

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 4cm

    Answer: 10.77cm
  4. 4. Ratio

    Divide 270 in the ratio 4:2:3

    Answer: 120, 60 and 90
  5. 5. Statistics

    Find the mean of: 12, 3, 8, 12

    Answer: 8.75

Tuesday 14 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 2⁄8

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 3x + 7 = 40

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 7cm

    Answer: 11.4cm
  4. 4. Ratio

    Share 52 in the ratio 1:3

    Answer: 13 and 39
  5. 5. Statistics

    Calculate the mean of: 24, 27, 29, 40, 44, 29, 39

    Answer: 33.1

Wednesday 15 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra

    Solve: 7x - 7 = 84

    Answer: x = 13
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio

    Share 64 in the ratio 3:1

    Answer: 48 and 16
  5. 5. Statistics

    Find the mean of: 8, 6, 3, 7

    Answer: 6

Thursday 16 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄6 + 7⁄8

    Answer: 11⁄8
  2. 2. Algebra

    Solve: 5x - 12 = 38

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 17.69cm
  4. 4. Ratio

    Share 30 in the ratio 2:3

    Answer: 12 and 18
  5. 5. Statistics

    Find the mean of: 5, 11, 2

    Answer: 6

Friday 17 July 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄10 + 2⁄10

    Answer: 3⁄10
  2. 2. Algebra

    Solve: 2x + 8 = 14

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio

    Share 35 in the ratio 3:2

    Answer: 21 and 14
  5. 5. Statistics

    Calculate the mean of: 22, 13, 27, 41, 36, 36

    Answer: 29.2