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Cornerstone Jan 13 - 19 25 questions
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Monday 13 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra

    Solve: 6x + 8 = 68

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio

    Share 51 in the ratio 1:2

    Answer: 17 and 34
  5. 5. Statistics

    Calculate the mean of: 32, 13, 47, 16, 29, 29, 20

    Answer: 26.6

Tuesday 14 January 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 + 6 = 30

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 10cm

    Answer: 12.21cm
  4. 4. Ratio

    Divide 168 in the ratio 3:3:1

    Answer: 72, 72 and 24
  5. 5. Statistics

    Find the mean of: 5, 2, 6

    Answer: 4.3333333333333

Wednesday 15 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 5⁄7

    Answer: 39⁄35
  2. 2. Algebra

    Solve: 7x - 16 = 54

    Answer: x = 10
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio

    Divide 66 in the ratio 3:1:2

    Answer: 33, 11 and 22
  5. 5. Statistics

    Calculate the mean of: 26, 9, 23, 42, 40, 15, 27

    Answer: 26

Thursday 16 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄12 + 4⁄12

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 8x - 11 = 21

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio

    Divide 117 in the ratio 4:2:3

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

    Calculate the mean of: 32, 7, 23, 47, 50, 19, 21, 30

    Answer: 28.6

Friday 17 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 5⁄8

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 4x + 11 = 55

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 15cm
  4. 4. Ratio

    Divide 108 in the ratio 3:2:1

    Answer: 54, 36 and 18
  5. 5. Statistics

    Find the mean of: 2, 11, 10, 13

    Answer: 9