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Cornerstone Sep 9 - 15 25 questions
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Monday 9 September 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 4⁄5

    Answer: 43⁄35
  2. 2. Algebra

    Solve: 7x - 15 = 48

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 180 in the ratio 3:1:2

    Answer: 90, 30 and 60
  5. 5. Statistics

    Find the mean of: 7, 10, 12, 11

    Answer: 10

Tuesday 10 September 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 3⁄8

    Answer: 31⁄40
  2. 2. Algebra

    Solve: 4x - 20 = 4

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 11cm

    Answer: 12.08cm
  4. 4. Ratio

    Divide 189 in the ratio 3:2:2

    Answer: 81, 54 and 54
  5. 5. Statistics

    Find the mean of: 11, 20, 20, 14

    Answer: 16.25

Wednesday 11 September 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 4x + 14 = 42

    Answer: x = 7
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio

    Divide 196 in the ratio 1:4:2

    Answer: 28, 112 and 56
  5. 5. Statistics

    Calculate the mean of: 6, 7, 39, 13, 39, 6, 40, 45

    Answer: 24.4

Thursday 12 September 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 7⁄8

    Answer: 9⁄8
  2. 2. Algebra

    Solve: 2x + 6 = 18

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 9cm

    Answer: 9.49cm
  4. 4. Ratio

    Divide 50 in the ratio 2:2:1

    Answer: 20, 20 and 10
  5. 5. Statistics

    Calculate the mean of: 47, 31, 36, 42, 23, 46, 22, 28

    Answer: 34.4

Friday 13 September 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra

    Solve: 8x - 20 = 44

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 37cm
  4. 4. Ratio

    Divide 96 in the ratio 2:1:3

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

    Find the mean of: 6, 8, 17, 2

    Answer: 8.25