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Cornerstone Aug 23 - 29 25 questions
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Monday 23 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 45 + 17

    Answer: 3335
  2. 2. Algebra

    Solve: 6x - 17 = 7

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 11cm

    Answer: 11.7cm
  4. 4. Ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics

    Calculate the mean of: 14, 36, 34, 41, 25, 28, 27

    Answer: 29.3

Tuesday 24 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 14 + 13

    Answer: 712
  2. 2. Algebra

    Solve: 7x - 8 = 48

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio

    Divide 270 in the ratio 3:4:2

    Answer: 90, 120 and 60
  5. 5. Statistics

    Find the mean of: 16, 12, 4, 6

    Answer: 9.5

Wednesday 25 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 69 + 29

    Answer: 89
  2. 2. Algebra

    Solve: 5x + 3 = 33

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Divide 190 in the ratio 4:3:3

    Answer: 76, 57 and 57
  5. 5. Statistics

    Calculate the mean of: 33, 27, 23, 48, 41, 33, 18, 35

    Answer: 32.3

Thursday 26 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 23 + 48

    Answer: 76
  2. 2. Algebra

    Solve: 5x + 10 = 50

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 15cm
  4. 4. Ratio

    Divide 270 in the ratio 3:4:3

    Answer: 81, 108 and 81
  5. 5. Statistics

    Calculate the mean of: 39, 31, 47, 15, 6, 36, 42, 28

    Answer: 30.5

Friday 27 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 17 + 57

    Answer: 67
  2. 2. Algebra

    Solve: 8x - 5 = 35

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 37cm
  4. 4. Ratio

    Divide 135 in the ratio 1:4:4

    Answer: 15, 60 and 60
  5. 5. Statistics

    Find the mean of: 14, 15, 10

    Answer: 13