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Cornerstone Oct 21 - 27 25 questions
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Monday 21 October 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 2⁄3

    Answer: 26⁄21
  2. 2. Algebra

    Solve: 6x - 6 = 36

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio

    Divide 100 in the ratio 2:2:1

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

    Calculate the mean of: 38, 43, 28, 44, 17, 15, 44, 20

    Answer: 31.1

Tuesday 22 October 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄11 + 3⁄11

    Answer: 6⁄11
  2. 2. Algebra

    Solve: 8x - 12 = 36

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 29cm
  4. 4. Ratio

    Divide 270 in the ratio 2:3:4

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

    Calculate the mean of: 42, 10, 7, 23, 21, 38

    Answer: 23.5

Wednesday 23 October 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 4⁄6

    Answer: 1⁄1
  2. 2. Algebra

    Solve: 7x + 11 = 67

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 6cm

    Answer: 11.66cm
  4. 4. Ratio

    Divide 75 in the ratio 1:3:1

    Answer: 15, 45 and 15
  5. 5. Statistics

    Find the mean of: 9, 10, 17

    Answer: 12

Thursday 24 October 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra

    Solve: 2x + 12 = 30

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 14cm

    Answer: 16.64cm
  4. 4. Ratio

    Share 65 in the ratio 1:4

    Answer: 13 and 52
  5. 5. Statistics

    Calculate the mean of: 9, 26, 6, 43, 15, 14

    Answer: 18.8

Friday 25 October 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Solve: 3x - 8 = 16

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 15cm
  4. 4. Ratio

    Share 70 in the ratio 2:3

    Answer: 28 and 42
  5. 5. Statistics

    Find the mean of: 17, 10, 12, 11, 13

    Answer: 12.6