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Cornerstone Jan 7 - 13 25 questions
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Monday 7 January 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra

    Solve: 6x - 18 = 30

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 12.65cm
  4. 4. Ratio

    Divide 90 in the ratio 4:4:1

    Answer: 40, 40 and 10
  5. 5. Statistics

    Find the mean of: 14, 19, 6, 6, 19

    Answer: 12.8

Tuesday 8 January 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄11 + 7⁄11

    Answer: 8⁄11
  2. 2. Algebra

    Solve: 8x - 18 = 62

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 12cm

    Answer: 12.37cm
  4. 4. Ratio

    Divide 234 in the ratio 4:1:4

    Answer: 104, 26 and 104
  5. 5. Statistics

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

    Answer: 11.75

Wednesday 9 January 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 1⁄6

    Answer: 5⁄12
  2. 2. Algebra

    Solve: 2x + 12 = 32

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Divide 50 in the ratio 3:1:1

    Answer: 30, 10 and 10
  5. 5. Statistics

    Calculate the mean of: 42, 30, 13, 29, 18, 6, 47

    Answer: 26.4

Thursday 10 January 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 5⁄7

    Answer: 39⁄35
  2. 2. Algebra

    Solve: 2x + 3 = 19

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 5.66cm
  4. 4. Ratio

    Divide 91 in the ratio 1:4:2

    Answer: 13, 52 and 26
  5. 5. Statistics

    Calculate the mean of: 26, 36, 45, 7, 21, 25, 12, 16

    Answer: 23.5

Friday 11 January 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄12 + 2⁄12

    Answer: 7⁄12
  2. 2. Algebra

    Solve: 8x - 16 = 24

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Divide 60 in the ratio 1:2:3

    Answer: 10, 20 and 30
  5. 5. Statistics

    Find the mean of: 6, 10, 19

    Answer: 11.666666666667