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Cornerstone Mar 15 - 21 25 questions
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Monday 15 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄10 + 2⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 6x + 3 = 27

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 6cm

    Answer: 13.42cm
  4. 4. Ratio

    Divide 125 in the ratio 1:3:1

    Answer: 25, 75 and 25
  5. 5. Statistics

    Calculate the mean of: 39, 50, 30, 10, 11, 49, 29, 38

    Answer: 32

Tuesday 16 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 2⁄4

    Answer: 11⁄10
  2. 2. Algebra

    Solve: 6x + 8 = 38

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 250 in the ratio 2:2:1

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

    Calculate the mean of: 33, 33, 50, 29, 35, 38, 41, 24

    Answer: 35.4

Wednesday 17 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7⁄11 + 2⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 8x - 8 = 24

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio

    Divide 160 in the ratio 4:3:1

    Answer: 80, 60 and 20
  5. 5. Statistics

    Find the mean of: 14, 5, 8

    Answer: 9

Thursday 18 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7⁄10 + 2⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Solve: 6x - 8 = 82

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio

    Divide 96 in the ratio 3:1:4

    Answer: 36, 12 and 48
  5. 5. Statistics

    Find the mean of: 10, 8, 19

    Answer: 12.333333333333

Friday 19 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 3⁄8

    Answer: 39⁄40
  2. 2. Algebra

    Solve: 5x + 6 = 26

    Answer: x = 4
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio

    Divide 198 in the ratio 3:4:4

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

    Calculate the mean of: 41, 23, 15, 24, 39, 8

    Answer: 25