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Cornerstone Sep 27 - Oct 3 25 questions
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Monday 27 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1012 + 112

    Answer: 1112
  2. 2. Algebra

    Solve: 3x + 5 = 35

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Share 54 in the ratio 1:2

    Answer: 18 and 36
  5. 5. Statistics

    Find the mean of: 19, 16, 16, 6, 16

    Answer: 14.6

Tuesday 28 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 210 + 610

    Answer: 45
  2. 2. Algebra

    Solve: 4x + 7 = 47

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Share 60 in the ratio 1:4

    Answer: 12 and 48
  5. 5. Statistics

    Find the mean of: 20, 9, 8, 4, 15

    Answer: 11.2

Wednesday 29 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 15 + 14

    Answer: 920
  2. 2. Algebra

    Solve: 8x - 20 = 92

    Answer: x = 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 7cm

    Answer: 10.63cm
  4. 4. Ratio

    Share 76 in the ratio 3:1

    Answer: 57 and 19
  5. 5. Statistics

    Calculate the mean of: 34, 25, 6, 21, 38, 17, 42, 20

    Answer: 25.4

Thursday 30 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 13 + 27

    Answer: 1321
  2. 2. Algebra

    Solve: 4x - 20 = 40

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 9cm

    Answer: 11.4cm
  4. 4. Ratio

    Share 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics

    Calculate the mean of: 12, 10, 25, 44, 49, 26, 21

    Answer: 26.7

Friday 1 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 23 + 14

    Answer: 1112
  2. 2. Algebra

    Solve: 3x - 19 = -4

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Share 45 in the ratio 3:2

    Answer: 27 and 18
  5. 5. Statistics

    Find the mean of: 12, 8, 17, 20, 20

    Answer: 15.4