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Cornerstone Jan 27 - Feb 2 25 questions
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Monday 27 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄8 + 6⁄7

    Answer: 55⁄56
  2. 2. Algebra

    Solve: 3x - 11 = 22

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics

    Calculate the mean of: 12, 7, 38, 29, 48, 42, 9

    Answer: 26.4

Tuesday 28 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄6 + 3⁄7

    Answer: 25⁄42
  2. 2. Algebra

    Solve: 4x - 5 = 51

    Answer: x = 14
  3. 3. Geometry

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

    Answer: 37cm
  4. 4. Ratio

    Share 15 in the ratio 2:1

    Answer: 10 and 5
  5. 5. Statistics

    Calculate the mean of: 42, 42, 20, 17, 36, 32, 28, 33

    Answer: 31.3

Wednesday 29 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 5x + 3 = 58

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 11cm

    Answer: 12.53cm
  4. 4. Ratio

    Share 95 in the ratio 2:3

    Answer: 38 and 57
  5. 5. Statistics

    Find the mean of: 3, 18, 15, 13

    Answer: 12.25

Thursday 30 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 2x + 7 = 29

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio

    Share 48 in the ratio 2:1

    Answer: 32 and 16
  5. 5. Statistics

    Find the mean of: 4, 16, 14

    Answer: 11.333333333333

Friday 31 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄8 + 1⁄7

    Answer: 11⁄28
  2. 2. Algebra

    Solve: 2x - 15 = -3

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 7cm

    Answer: 8.06cm
  4. 4. Ratio

    Share 90 in the ratio 3:2

    Answer: 54 and 36
  5. 5. Statistics

    Calculate the mean of: 34, 50, 24, 32, 46, 21, 9, 18

    Answer: 29.3