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Cornerstone Jun 21 - 27 25 questions
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Monday 21 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄8 + 1⁄8

    Answer: 3⁄8
  2. 2. Algebra

    Solve: 8x - 14 = 50

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 9.9cm
  4. 4. Ratio

    Divide 91 in the ratio 1:3:3

    Answer: 13, 39 and 39
  5. 5. Statistics

    Find the mean of: 14, 16, 2, 18

    Answer: 12.5

Tuesday 22 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄8 + 3⁄5

    Answer: 27⁄20
  2. 2. Algebra

    Solve: 5x - 8 = 67

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Divide 133 in the ratio 4:1:2

    Answer: 76, 19 and 38
  5. 5. Statistics

    Find the mean of: 17, 11, 11, 18, 7

    Answer: 12.8

Wednesday 23 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄11 + 2⁄11

    Answer: 10⁄11
  2. 2. Algebra

    Solve: 4x + 4 = 32

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 14cm

    Answer: 18.44cm
  4. 4. Ratio

    Divide 152 in the ratio 3:2:3

    Answer: 57, 38 and 57
  5. 5. Statistics

    Calculate the mean of: 18, 38, 8, 27, 48, 6, 16

    Answer: 23

Thursday 24 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄8 + 1⁄8

    Answer: 5⁄8
  2. 2. Algebra

    Solve: 7x + 3 = 80

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 9cm

    Answer: 9.49cm
  4. 4. Ratio

    Share 72 in the ratio 1:3

    Answer: 18 and 54
  5. 5. Statistics

    Find the mean of: 7, 13, 10, 17, 13

    Answer: 12

Friday 25 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄4 + 1⁄7

    Answer: 25⁄28
  2. 2. Algebra

    Solve: 6x - 19 = 71

    Answer: x = 15
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Share 36 in the ratio 2:1

    Answer: 24 and 12
  5. 5. Statistics

    Calculate the mean of: 39, 35, 12, 5, 39, 49, 27

    Answer: 29.4