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Cornerstone Feb 14 - 20 25 questions
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Monday 14 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 6x + 11 = 41

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 10cm

    Answer: 11.18cm
  4. 4. Ratio

    Divide 144 in the ratio 3:1:4

    Answer: 54, 18 and 72
  5. 5. Statistics

    Calculate the mean of: 31, 49, 8, 44, 39, 37, 6, 15

    Answer: 28.6

Tuesday 15 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 1⁄4

    Answer: 17⁄20
  2. 2. Algebra

    Solve: 7x - 11 = 52

    Answer: x = 9
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Divide 176 in the ratio 4:3:1

    Answer: 88, 66 and 22
  5. 5. Statistics

    Find the mean of: 13, 15, 17, 12, 11

    Answer: 13.6

Wednesday 16 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄8 + 2⁄8

    Answer: 3⁄8
  2. 2. Algebra

    Solve: 8x - 5 = 59

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 12.73cm
  4. 4. Ratio

    Divide 120 in the ratio 3:2:3

    Answer: 45, 30 and 45
  5. 5. Statistics

    Find the mean of: 15, 20, 9, 13, 19

    Answer: 15.2

Thursday 17 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra

    Solve: 7x + 11 = 81

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 37cm
  4. 4. Ratio

    Divide 220 in the ratio 2:1:2

    Answer: 88, 44 and 88
  5. 5. Statistics

    Calculate the mean of: 40, 33, 32, 14, 12, 43

    Answer: 29

Friday 18 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄8 + 2⁄6

    Answer: 17⁄24
  2. 2. Algebra

    Solve: 5x + 15 = 50

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 168 in the ratio 2:3:3

    Answer: 42, 63 and 63
  5. 5. Statistics

    Calculate the mean of: 23, 9, 26, 22, 33, 43

    Answer: 26