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Cornerstone Nov 16 - 22 25 questions
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Monday 16 November 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 5x - 7 = 13

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 15cm
  4. 4. Ratio

    Divide 130 in the ratio 1:3:1

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

    Calculate the mean of: 7, 36, 23, 27, 26, 44

    Answer: 27.2

Tuesday 17 November 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄12 + 4⁄12

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 6x + 6 = 54

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 12cm

    Answer: 15.62cm
  4. 4. Ratio

    Divide 90 in the ratio 2:3:4

    Answer: 20, 30 and 40
  5. 5. Statistics

    Find the mean of: 13, 19, 17, 8, 2

    Answer: 11.8

Wednesday 18 November 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 3x + 4 = 22

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 10cm

    Answer: 15.62cm
  4. 4. Ratio

    Divide 270 in the ratio 3:3:4

    Answer: 81, 81 and 108
  5. 5. Statistics

    Find the mean of: 7, 4, 19

    Answer: 10

Thursday 19 November 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄5 + 6⁄8

    Answer: 19⁄20
  2. 2. Algebra

    Solve: 7x - 13 = 43

    Answer: x = 8
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio

    Divide 90 in the ratio 2:2:1

    Answer: 36, 36 and 18
  5. 5. Statistics

    Calculate the mean of: 21, 47, 44, 29, 6, 27

    Answer: 29

Friday 20 November 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄11 + 4⁄11

    Answer: 7⁄11
  2. 2. Algebra

    Solve: 4x - 9 = 27

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio

    Divide 136 in the ratio 1:3:4

    Answer: 17, 51 and 68
  5. 5. Statistics

    Find the mean of: 3, 4, 6, 14, 5

    Answer: 6.4