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Cornerstone Jul 19 - 25 25 questions
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Monday 19 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 3x - 19 = 20

    Answer: x = 13
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 6cm

    Answer: 12.53cm
  4. 4. Ratio

    Share 60 in the ratio 3:1

    Answer: 45 and 15
  5. 5. Statistics

    Find the mean of: 19, 19, 5, 15, 17

    Answer: 15

Tuesday 20 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 7⁄8 + 1⁄4

    Answer: 9⁄8
  2. 2. Algebra

    Solve: 8x - 10 = 102

    Answer: x = 14
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics

    Calculate the mean of: 39, 14, 27, 10, 10, 49

    Answer: 24.8

Wednesday 21 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 3x + 4 = 40

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio

    Share 49 in the ratio 4:3

    Answer: 28 and 21
  5. 5. Statistics

    Find the mean of: 6, 6, 14, 12, 18

    Answer: 11.2

Thursday 22 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra

    Solve: 5x + 4 = 49

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Share 70 in the ratio 4:1

    Answer: 56 and 14
  5. 5. Statistics

    Find the mean of: 17, 3, 11, 19

    Answer: 12.5

Friday 23 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra

    Solve: 8x - 5 = 91

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 8cm

    Answer: 12.04cm
  4. 4. Ratio

    Share 90 in the ratio 2:3

    Answer: 36 and 54
  5. 5. Statistics

    Calculate the mean of: 48, 39, 32, 42, 10, 37

    Answer: 34.7