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Cornerstone Nov 1 - 7 25 questions
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Monday 1 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄5 + 2⁄4

    Answer: 7⁄10
  2. 2. Algebra

    Solve: 3x + 12 = 45

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio

    Divide 176 in the ratio 4:3:1

    Answer: 88, 66 and 22
  5. 5. Statistics

    Find the mean of: 2, 16, 2

    Answer: 6.6666666666667

Tuesday 2 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄9 + 3⁄9

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 3x + 15 = 48

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 18.6cm
  4. 4. Ratio

    Divide 126 in the ratio 4:2:3

    Answer: 56, 28 and 42
  5. 5. Statistics

    Find the mean of: 6, 12, 20, 5, 5

    Answer: 9.6

Wednesday 3 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 7⁄8 + 2⁄5

    Answer: 51⁄40
  2. 2. Algebra

    Solve: 3x - 9 = 36

    Answer: x = 15
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio

    Divide 60 in the ratio 2:2:1

    Answer: 24, 24 and 12
  5. 5. Statistics

    Calculate the mean of: 20, 16, 13, 32, 39, 20

    Answer: 23.3

Thursday 4 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 4⁄8

    Answer: 15⁄14
  2. 2. Algebra

    Solve: 3x - 5 = 13

    Answer: x = 6
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio

    Share 140 in the ratio 3:4

    Answer: 60 and 80
  5. 5. Statistics

    Find the mean of: 8, 6, 19

    Answer: 11

Friday 5 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄5 + 2⁄5

    Answer: 3⁄5
  2. 2. Algebra

    Solve: 5x + 3 = 28

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 7cm

    Answer: 11.4cm
  4. 4. Ratio

    Share 91 in the ratio 3:4

    Answer: 39 and 52
  5. 5. Statistics

    Calculate the mean of: 15, 8, 10, 27, 33, 48

    Answer: 23.5