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Cornerstone Feb 4 - 10 25 questions
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Monday 4 February 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 5⁄7

    Answer: 27⁄28
  2. 2. Algebra

    Solve: 7x - 20 = 85

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 7cm

    Answer: 8.6cm
  4. 4. Ratio

    Share 35 in the ratio 1:4

    Answer: 7 and 28
  5. 5. Statistics

    Find the mean of: 7, 3, 14, 12, 20

    Answer: 11.2

Tuesday 5 February 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄9 + 2⁄9

    Answer: 4⁄9
  2. 2. Algebra

    Solve: 4x + 7 = 19

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Share 51 in the ratio 1:2

    Answer: 17 and 34
  5. 5. Statistics

    Calculate the mean of: 18, 47, 15, 41, 28, 16

    Answer: 27.5

Wednesday 6 February 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄8 + 1⁄3

    Answer: 11⁄24
  2. 2. Algebra

    Solve: 2x + 14 = 26

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 10cm

    Answer: 13.45cm
  4. 4. Ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics

    Calculate the mean of: 17, 8, 7, 26, 16, 37, 16

    Answer: 18.1

Thursday 7 February 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄11 + 2⁄11

    Answer: 10⁄11
  2. 2. Algebra

    Solve: 5x - 20 = 20

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio

    Share 72 in the ratio 1:3

    Answer: 18 and 54
  5. 5. Statistics

    Find the mean of: 11, 19, 10, 6

    Answer: 11.5

Friday 8 February 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7⁄11 + 3⁄11

    Answer: 10⁄11
  2. 2. Algebra

    Solve: 2x - 7 = 7

    Answer: x = 7
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Share 50 in the ratio 3:2

    Answer: 30 and 20
  5. 5. Statistics

    Find the mean of: 13, 4, 10

    Answer: 9