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Cornerstone Oct 12 - 18 25 questions
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Monday 12 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 2x + 12 = 18

    Answer: x = 3
  3. 3. Geometry

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

    Answer: 11.4cm
  4. 4. Ratio

    Divide 133 in the ratio 1:4:2

    Answer: 19, 76 and 38
  5. 5. Statistics

    Find the mean of: 10, 11, 11

    Answer: 10.666666666667

Tuesday 13 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 1⁄3

    Answer: 14⁄15
  2. 2. Algebra

    Solve: 2x - 15 = -5

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio

    Divide 104 in the ratio 3:2:3

    Answer: 39, 26 and 39
  5. 5. Statistics

    Calculate the mean of: 47, 30, 22, 25, 16, 31

    Answer: 28.5

Wednesday 14 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 4⁄6

    Answer: 22⁄15
  2. 2. Algebra

    Solve: 7x - 13 = 64

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 95 in the ratio 4:1

    Answer: 76 and 19
  5. 5. Statistics

    Find the mean of: 19, 8, 12, 12

    Answer: 12.75

Thursday 15 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄5 + 3⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 5x + 6 = 51

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 6.4cm
  4. 4. Ratio

    Share 77 in the ratio 3:4

    Answer: 33 and 44
  5. 5. Statistics

    Calculate the mean of: 18, 34, 27, 44, 7, 37

    Answer: 27.8

Friday 16 October 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄7 + 1⁄8

    Answer: 15⁄56
  2. 2. Algebra

    Solve: 3x + 7 = 40

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Share 60 in the ratio 1:2

    Answer: 20 and 40
  5. 5. Statistics

    Calculate the mean of: 41, 39, 19, 21, 9, 25, 47, 25

    Answer: 28.3