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Cornerstone Feb 28 - Mar 6 25 questions
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Monday 28 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄4 + 3⁄8

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 3x - 8 = 34

    Answer: x = 14
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio

    Share 96 in the ratio 2:1

    Answer: 64 and 32
  5. 5. Statistics

    Find the mean of: 16, 14, 11, 16, 7

    Answer: 12.8

Tuesday 1 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄7 + 1⁄4

    Answer: 15⁄28
  2. 2. Algebra

    Solve: 6x - 6 = 84

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 13cm

    Answer: 14.32cm
  4. 4. Ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics

    Calculate the mean of: 14, 22, 14, 29, 24, 16, 12

    Answer: 18.7

Wednesday 2 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄6 + 4⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 7x - 9 = 54

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 85 in the ratio 2:3

    Answer: 34 and 51
  5. 5. Statistics

    Calculate the mean of: 19, 41, 13, 43, 20, 42, 35

    Answer: 30.4

Thursday 3 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra

    Solve: 6x + 3 = 63

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 16.64cm
  4. 4. Ratio

    Share 15 in the ratio 2:1

    Answer: 10 and 5
  5. 5. Statistics

    Find the mean of: 8, 5, 2, 20, 4

    Answer: 7.8

Friday 4 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 1⁄8

    Answer: 37⁄40
  2. 2. Algebra

    Solve: 3x + 9 = 24

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 14cm

    Answer: 15.65cm
  4. 4. Ratio

    Divide 96 in the ratio 3:1:2

    Answer: 48, 16 and 32
  5. 5. Statistics

    Calculate the mean of: 13, 25, 47, 7, 24, 17, 29, 6

    Answer: 21