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Cornerstone May 10 - 16 25 questions
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Monday 10 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 7⁄8 + 3⁄4

    Answer: 13⁄8
  2. 2. Algebra

    Solve: 8x - 6 = 42

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 8cm

    Answer: 12.81cm
  4. 4. Ratio

    Divide 154 in the ratio 3:3:1

    Answer: 66, 66 and 22
  5. 5. Statistics

    Find the mean of: 5, 7, 12, 7

    Answer: 7.75

Tuesday 11 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄7 + 3⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 3x + 12 = 33

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 37cm
  4. 4. Ratio

    Divide 75 in the ratio 1:3:1

    Answer: 15, 45 and 15
  5. 5. Statistics

    Calculate the mean of: 47, 8, 26, 11, 46, 18

    Answer: 26

Wednesday 12 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 7⁄8 + 4⁄6

    Answer: 37⁄24
  2. 2. Algebra

    Solve: 2x + 13 = 37

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 14cm

    Answer: 18.44cm
  4. 4. Ratio

    Divide 132 in the ratio 1:2:3

    Answer: 22, 44 and 66
  5. 5. Statistics

    Calculate the mean of: 17, 8, 9, 19, 45, 43, 50

    Answer: 27.3

Thursday 13 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra

    Solve: 2x - 14 = -4

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 84 in the ratio 2:1:1

    Answer: 42, 21 and 21
  5. 5. Statistics

    Find the mean of: 3, 10, 13

    Answer: 8.6666666666667

Friday 14 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄10 + 5⁄10

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 6x - 11 = 67

    Answer: x = 13
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics

    Calculate the mean of: 44, 43, 49, 15, 44, 7, 16

    Answer: 31.1