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Cornerstone Sep 21 - 27 25 questions
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Monday 21 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄11 + 3⁄11

    Answer: 5⁄11
  2. 2. Algebra

    Solve: 2x - 19 = -3

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio

    Divide 260 in the ratio 2:2:1

    Answer: 104, 104 and 52
  5. 5. Statistics

    Find the mean of: 7, 9, 15

    Answer: 10.333333333333

Tuesday 22 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄7 + 3⁄6

    Answer: 11⁄14
  2. 2. Algebra

    Solve: 4x - 14 = 10

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Divide 70 in the ratio 1:4:2

    Answer: 10, 40 and 20
  5. 5. Statistics

    Find the mean of: 13, 15, 13, 18

    Answer: 14.75

Wednesday 23 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄10 + 2⁄10

    Answer: 3⁄5
  2. 2. Algebra

    Solve: 2x + 8 = 16

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 6cm

    Answer: 7.21cm
  4. 4. Ratio

    Divide 168 in the ratio 2:4:1

    Answer: 48, 96 and 24
  5. 5. Statistics

    Calculate the mean of: 31, 20, 13, 33, 31, 35

    Answer: 27.2

Thursday 24 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄8 + 2⁄8

    Answer: 1⁄2
  2. 2. Algebra

    Solve: 5x + 6 = 31

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 4cm

    Answer: 7.21cm
  4. 4. Ratio

    Share 33 in the ratio 2:1

    Answer: 22 and 11
  5. 5. Statistics

    Find the mean of: 5, 4, 19

    Answer: 9.3333333333333

Friday 25 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 1⁄6

    Answer: 17⁄30
  2. 2. Algebra

    Solve: 7x - 11 = 94

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 98 in the ratio 3:4

    Answer: 42 and 56
  5. 5. Statistics

    Calculate the mean of: 15, 50, 33, 27, 46, 47, 25, 29

    Answer: 34