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Cornerstone Feb 17 - 23 25 questions
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Monday 17 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄7 + 1⁄6

    Answer: 13⁄42
  2. 2. Algebra

    Solve: 2x + 11 = 25

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 12cm

    Answer: 13.89cm
  4. 4. Ratio

    Share 70 in the ratio 1:4

    Answer: 14 and 56
  5. 5. Statistics

    Find the mean of: 18, 10, 2

    Answer: 10

Tuesday 18 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄7 + 2⁄4

    Answer: 9⁄14
  2. 2. Algebra

    Solve: 5x + 7 = 67

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 11.18cm
  4. 4. Ratio

    Divide 176 in the ratio 4:4:3

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

    Find the mean of: 3, 19, 9

    Answer: 10.333333333333

Wednesday 19 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄7 + 2⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 7x - 20 = 43

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Share 85 in the ratio 2:3

    Answer: 34 and 51
  5. 5. Statistics

    Calculate the mean of: 9, 28, 44, 11, 13, 7, 39

    Answer: 21.6

Thursday 20 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄8 + 3⁄4

    Answer: 9⁄8
  2. 2. Algebra

    Solve: 5x - 15 = 20

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 13cm

    Answer: 17.69cm
  4. 4. Ratio

    Share 36 in the ratio 2:1

    Answer: 24 and 12
  5. 5. Statistics

    Find the mean of: 6, 5, 13, 11, 17

    Answer: 10.4

Friday 21 February 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄11 + 2⁄11

    Answer: 10⁄11
  2. 2. Algebra

    Solve: 3x + 9 = 39

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 37cm
  4. 4. Ratio

    Share 50 in the ratio 3:2

    Answer: 30 and 20
  5. 5. Statistics

    Calculate the mean of: 39, 13, 49, 30, 24, 11, 12

    Answer: 25.4