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Cornerstone Nov 22 - 28 25 questions
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Monday 22 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄4 + 4⁄7

    Answer: 15⁄14
  2. 2. Algebra

    Solve: 2x + 5 = 23

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 13cm

    Answer: 15.26cm
  4. 4. Ratio

    Divide 156 in the ratio 3:2:1

    Answer: 78, 52 and 26
  5. 5. Statistics

    Calculate the mean of: 49, 42, 46, 43, 29, 22, 30

    Answer: 37.3

Tuesday 23 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄6 + 3⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 7x - 20 = 50

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Divide 150 in the ratio 2:2:1

    Answer: 60, 60 and 30
  5. 5. Statistics

    Find the mean of: 2, 13, 18, 9

    Answer: 10.5

Wednesday 24 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 4x - 16 = 28

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Share 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics

    Calculate the mean of: 5, 45, 44, 29, 35, 47, 5

    Answer: 30

Thursday 25 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄8 + 4⁄7

    Answer: 15⁄14
  2. 2. Algebra

    Solve: 7x + 8 = 85

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 15cm

    Answer: 19.21cm
  4. 4. Ratio

    Share 84 in the ratio 1:2

    Answer: 28 and 56
  5. 5. Statistics

    Find the mean of: 14, 18, 15, 7, 16

    Answer: 14

Friday 26 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 7x + 11 = 95

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 11cm

    Answer: 12.08cm
  4. 4. Ratio

    Share 50 in the ratio 2:3

    Answer: 20 and 30
  5. 5. Statistics

    Find the mean of: 6, 2, 14, 8, 16

    Answer: 9.2