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Cornerstone Sep 14 - 20 25 questions
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Monday 14 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄7 + 3⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 4x - 14 = 38

    Answer: x = 13
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 8cm

    Answer: 12.04cm
  4. 4. Ratio

    Divide 138 in the ratio 3:1:2

    Answer: 69, 23 and 46
  5. 5. Statistics

    Calculate the mean of: 13, 48, 38, 21, 33, 29, 20

    Answer: 28.9

Tuesday 15 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 7⁄8

    Answer: 29⁄24
  2. 2. Algebra

    Solve: 5x + 15 = 75

    Answer: x = 12
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio

    Divide 90 in the ratio 3:1:2

    Answer: 45, 15 and 30
  5. 5. Statistics

    Find the mean of: 2, 2, 14, 19, 20

    Answer: 11.4

Wednesday 16 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄10 + 4⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Solve: 6x + 7 = 79

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 15cm

    Answer: 16.16cm
  4. 4. Ratio

    Divide 125 in the ratio 2:1:2

    Answer: 50, 25 and 50
  5. 5. Statistics

    Find the mean of: 7, 4, 15

    Answer: 8.6666666666667

Thursday 17 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄6 + 3⁄4

    Answer: 19⁄12
  2. 2. Algebra

    Solve: 2x - 8 = 22

    Answer: x = 15
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Divide 120 in the ratio 3:2:3

    Answer: 45, 30 and 45
  5. 5. Statistics

    Calculate the mean of: 34, 38, 18, 40, 5, 39, 45

    Answer: 31.3

Friday 18 September 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄6 + 4⁄7

    Answer: 31⁄42
  2. 2. Algebra

    Solve: 5x - 20 = 15

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Divide 90 in the ratio 2:1:3

    Answer: 30, 15 and 45
  5. 5. Statistics

    Calculate the mean of: 30, 43, 9, 31, 48, 48, 11

    Answer: 31.4