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Cornerstone Aug 9 - 15 25 questions
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Monday 9 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 4x + 13 = 29

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 11cm

    Answer: 13.6cm
  4. 4. Ratio

    Divide 84 in the ratio 1:2:1

    Answer: 21, 42 and 21
  5. 5. Statistics

    Find the mean of: 12, 15, 18

    Answer: 15

Tuesday 10 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 3x + 13 = 22

    Answer: x = 3
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Divide 119 in the ratio 4:2:1

    Answer: 68, 34 and 17
  5. 5. Statistics

    Find the mean of: 2, 10, 7

    Answer: 6.3333333333333

Wednesday 11 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra

    Solve: 8x - 9 = 111

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 10.82cm
  4. 4. Ratio

    Divide 88 in the ratio 1:3:4

    Answer: 11, 33 and 44
  5. 5. Statistics

    Calculate the mean of: 16, 18, 24, 16, 22, 26

    Answer: 20.3

Thursday 12 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 5x - 8 = 52

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Divide 240 in the ratio 3:3:2

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

    Calculate the mean of: 7, 8, 23, 5, 45, 16

    Answer: 17.3

Friday 13 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄8 + 3⁄5

    Answer: 27⁄20
  2. 2. Algebra

    Solve: 7x + 7 = 70

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 10cm

    Answer: 10.44cm
  4. 4. Ratio

    Divide 182 in the ratio 1:3:3

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

    Find the mean of: 11, 4, 3

    Answer: 6