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Cornerstone Aug 31 - Sep 6 25 questions
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Monday 31 August 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 3⁄4

    Answer: 31⁄20
  2. 2. Algebra

    Solve: 7x - 15 = 62

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 10.77cm
  4. 4. Ratio

    Divide 104 in the ratio 3:3:2

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

    Find the mean of: 6, 14, 17, 7

    Answer: 11

Tuesday 1 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄8 + 3⁄4

    Answer: 1⁄1
  2. 2. Algebra

    Solve: 6x - 5 = 55

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 13.42cm
  4. 4. Ratio

    Divide 117 in the ratio 3:4:2

    Answer: 39, 52 and 26
  5. 5. Statistics

    Calculate the mean of: 38, 38, 21, 10, 38, 41, 10, 43

    Answer: 29.9

Wednesday 2 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7⁄11 + 2⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 6x - 17 = 67

    Answer: x = 14
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 250 in the ratio 1:2:2

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

    Calculate the mean of: 22, 22, 28, 9, 47, 8, 38

    Answer: 24.9

Thursday 3 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄8 + 1⁄4

    Answer: 3⁄8
  2. 2. Algebra

    Solve: 2x + 4 = 22

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 11cm

    Answer: 13.04cm
  4. 4. Ratio

    Divide 234 in the ratio 2:4:3

    Answer: 52, 104 and 78
  5. 5. Statistics

    Find the mean of: 2, 8, 3, 16

    Answer: 7.25

Friday 4 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄8 + 3⁄4

    Answer: 11⁄8
  2. 2. Algebra

    Solve: 6x + 8 = 62

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 13cm

    Answer: 13.34cm
  4. 4. Ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics

    Calculate the mean of: 36, 42, 17, 44, 48, 9

    Answer: 32.7