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Cornerstone Feb 3 - 9 25 questions
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Monday 3 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄4 + 7⁄8

    Answer: 13⁄8
  2. 2. Algebra

    Solve: 3x - 18 = 21

    Answer: x = 13
  3. 3. Geometry

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

    Answer: 12.65cm
  4. 4. Ratio

    Share 72 in the ratio 3:1

    Answer: 54 and 18
  5. 5. Statistics

    Calculate the mean of: 24, 29, 35, 25, 23, 35

    Answer: 28.5

Tuesday 4 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄8 + 5⁄6

    Answer: 29⁄24
  2. 2. Algebra

    Solve: 5x - 14 = 46

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Divide 153 in the ratio 4:2:3

    Answer: 68, 34 and 51
  5. 5. Statistics

    Find the mean of: 11, 11, 9

    Answer: 10.333333333333

Wednesday 5 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄9 + 4⁄9

    Answer: 7⁄9
  2. 2. Algebra

    Solve: 5x + 13 = 68

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 5cm

    Answer: 5.83cm
  4. 4. Ratio

    Divide 132 in the ratio 4:4:3

    Answer: 48, 48 and 36
  5. 5. Statistics

    Calculate the mean of: 26, 36, 22, 17, 11, 46, 35

    Answer: 27.6

Thursday 6 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra

    Solve: 3x + 4 = 13

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio

    Divide 100 in the ratio 2:1:2

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

    Calculate the mean of: 7, 35, 18, 24, 22, 7, 43

    Answer: 22.3

Friday 7 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 3x - 17 = 7

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 12.21cm
  4. 4. Ratio

    Divide 90 in the ratio 2:2:1

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

    Find the mean of: 8, 9, 2, 20

    Answer: 9.75