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Cornerstone Sep 6 - 12 25 questions
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Monday 6 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 36 + 16

    Answer: 23
  2. 2. Algebra

    Solve: 5x - 19 = 51

    Answer: x = 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio

    Share 85 in the ratio 2:3

    Answer: 34 and 51
  5. 5. Statistics

    Find the mean of: 8, 12, 11, 19, 3

    Answer: 10.6

Tuesday 7 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 26 + 23

    Answer: 11
  2. 2. Algebra

    Solve: 5x + 7 = 32

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio

    Share 32 in the ratio 1:3

    Answer: 8 and 24
  5. 5. Statistics

    Calculate the mean of: 31, 34, 33, 25, 41, 31

    Answer: 32.5

Wednesday 8 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 14 + 45

    Answer: 2120
  2. 2. Algebra

    Solve: 7x + 15 = 71

    Answer: x = 8
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio

    Share 55 in the ratio 1:4

    Answer: 11 and 44
  5. 5. Statistics

    Calculate the mean of: 27, 5, 34, 46, 43, 47, 39, 35

    Answer: 34.5

Thursday 9 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 39 + 19

    Answer: 49
  2. 2. Algebra

    Solve: 4x - 20 = 28

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 15cm

    Answer: 15.3cm
  4. 4. Ratio

    Share 84 in the ratio 4:3

    Answer: 48 and 36
  5. 5. Statistics

    Find the mean of: 6, 18, 13, 20, 12

    Answer: 13.8

Friday 10 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 58 + 18

    Answer: 34
  2. 2. Algebra

    Solve: 5x - 16 = 4

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics

    Find the mean of: 9, 8, 8

    Answer: 8.3333333333333