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Cornerstone Mar 22 - 28 25 questions
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Monday 22 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 4x - 18 = 2

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 15cm

    Answer: 18.6cm
  4. 4. Ratio

    Divide 176 in the ratio 3:4:4

    Answer: 48, 64 and 64
  5. 5. Statistics

    Calculate the mean of: 50, 14, 13, 22, 7, 30, 30

    Answer: 23.7

Tuesday 23 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 2⁄3

    Answer: 23⁄21
  2. 2. Algebra

    Solve: 2x + 7 = 29

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Divide 117 in the ratio 3:4:2

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

    Find the mean of: 4, 19, 13, 14

    Answer: 12.5

Wednesday 24 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 4⁄6

    Answer: 1⁄1
  2. 2. Algebra

    Solve: 7x + 11 = 60

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 7cm

    Answer: 13.04cm
  4. 4. Ratio

    Share 91 in the ratio 3:4

    Answer: 39 and 52
  5. 5. Statistics

    Calculate the mean of: 31, 14, 34, 11, 21, 40

    Answer: 25.2

Thursday 25 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄6 + 2⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 2x - 9 = 19

    Answer: x = 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 6cm

    Answer: 6.71cm
  4. 4. Ratio

    Share 35 in the ratio 3:2

    Answer: 21 and 14
  5. 5. Statistics

    Find the mean of: 17, 15, 10, 2

    Answer: 11

Friday 26 March 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄6 + 6⁄7

    Answer: 25⁄21
  2. 2. Algebra

    Solve: 3x - 15 = -3

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Share 60 in the ratio 3:2

    Answer: 36 and 24
  5. 5. Statistics

    Find the mean of: 8, 10, 15, 9, 17

    Answer: 11.8