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Cornerstone Oct 15 - 21 25 questions
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Monday 15 October 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄8 + 1⁄3

    Answer: 17⁄24
  2. 2. Algebra

    Solve: 4x + 6 = 54

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 128 in the ratio 4:3:1

    Answer: 64, 48 and 16
  5. 5. Statistics

    Calculate the mean of: 30, 14, 50, 43, 18, 50, 13

    Answer: 31.1

Tuesday 16 October 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄11 + 4⁄11

    Answer: 7⁄11
  2. 2. Algebra

    Solve: 3x + 6 = 39

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 7.07cm
  4. 4. Ratio

    Divide 96 in the ratio 1:3:4

    Answer: 12, 36 and 48
  5. 5. Statistics

    Calculate the mean of: 48, 33, 45, 9, 44, 36, 50, 34

    Answer: 37.4

Wednesday 17 October 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 1⁄6

    Answer: 5⁄12
  2. 2. Algebra

    Solve: 5x - 5 = 55

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 143 in the ratio 4:3:4

    Answer: 52, 39 and 52
  5. 5. Statistics

    Find the mean of: 3, 7, 8, 15, 17

    Answer: 10

Thursday 18 October 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄6 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra

    Solve: 7x - 19 = 44

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 29cm
  4. 4. Ratio

    Divide 154 in the ratio 3:4:4

    Answer: 42, 56 and 56
  5. 5. Statistics

    Find the mean of: 19, 5, 14

    Answer: 12.666666666667

Friday 19 October 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 4x + 7 = 51

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 12cm

    Answer: 15cm
  4. 4. Ratio

    Divide 240 in the ratio 4:3:1

    Answer: 120, 90 and 30
  5. 5. Statistics

    Calculate the mean of: 28, 49, 21, 11, 21, 49, 23, 8

    Answer: 26.3