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Cornerstone Jul 11 - 17 25 questions
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Monday 11 July 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 1⁄4

    Answer: 19⁄28
  2. 2. Algebra

    Solve: 2x - 5 = 25

    Answer: x = 15
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio

    Share 54 in the ratio 1:2

    Answer: 18 and 36
  5. 5. Statistics

    Find the mean of: 6, 5, 15, 13

    Answer: 9.75

Tuesday 12 July 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄6 + 2⁄6

    Answer: 1⁄2
  2. 2. Algebra

    Solve: 3x - 17 = 28

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 9cm

    Answer: 10.3cm
  4. 4. Ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics

    Find the mean of: 2, 8, 10, 16, 16

    Answer: 10.4

Wednesday 13 July 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄6 + 1⁄5

    Answer: 8⁄15
  2. 2. Algebra

    Solve: 6x + 8 = 50

    Answer: x = 7
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio

    Share 50 in the ratio 3:2

    Answer: 30 and 20
  5. 5. Statistics

    Calculate the mean of: 8, 28, 41, 26, 27, 33, 16

    Answer: 25.6

Thursday 14 July 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄6 + 3⁄5

    Answer: 19⁄15
  2. 2. Algebra

    Solve: 2x + 13 = 35

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 5cm
  4. 4. Ratio

    Divide 216 in the ratio 4:4:1

    Answer: 96, 96 and 24
  5. 5. Statistics

    Find the mean of: 9, 19, 13, 6

    Answer: 11.75

Friday 15 July 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 6x - 14 = 46

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 14cm

    Answer: 16.64cm
  4. 4. Ratio

    Divide 75 in the ratio 1:2:2

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

    Calculate the mean of: 20, 32, 31, 45, 43, 49, 43

    Answer: 37.6