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Cornerstone Jul 26 - Aug 1 25 questions
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Monday 26 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 4x + 9 = 29

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 13.6cm
  4. 4. Ratio

    Divide 264 in the ratio 4:4:3

    Answer: 96, 96 and 72
  5. 5. Statistics

    Calculate the mean of: 10, 9, 13, 20, 12, 32

    Answer: 16

Tuesday 27 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 2⁄4

    Answer: 11⁄10
  2. 2. Algebra

    Solve: 2x - 8 = 12

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Divide 153 in the ratio 3:4:2

    Answer: 51, 68 and 34
  5. 5. Statistics

    Find the mean of: 5, 10, 3, 20, 8

    Answer: 9.2

Wednesday 28 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 6⁄7

    Answer: 51⁄35
  2. 2. Algebra

    Solve: 7x - 13 = 43

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 85 in the ratio 2:2:1

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

    Find the mean of: 5, 8, 17, 20

    Answer: 12.5

Thursday 29 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄10 + 4⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Solve: 4x + 9 = 33

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 7.07cm
  4. 4. Ratio

    Divide 126 in the ratio 2:2:3

    Answer: 36, 36 and 54
  5. 5. Statistics

    Calculate the mean of: 14, 9, 48, 35, 5, 28, 37

    Answer: 25.1

Friday 30 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra

    Solve: 7x + 7 = 70

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Divide 80 in the ratio 2:1:1

    Answer: 40, 20 and 20
  5. 5. Statistics

    Calculate the mean of: 9, 47, 15, 38, 17, 34

    Answer: 26.7