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Cornerstone Jan 20 - 26 25 questions
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Monday 20 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 5⁄6

    Answer: 37⁄30
  2. 2. Algebra

    Solve: 6x - 9 = 63

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Divide 119 in the ratio 2:4:1

    Answer: 34, 68 and 17
  5. 5. Statistics

    Find the mean of: 7, 14, 10, 8, 6

    Answer: 9

Tuesday 21 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄12 + 3⁄12

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 4x + 3 = 39

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 12cm

    Answer: 14.42cm
  4. 4. Ratio

    Divide 80 in the ratio 1:4:3

    Answer: 10, 40 and 30
  5. 5. Statistics

    Calculate the mean of: 31, 41, 15, 9, 20, 41

    Answer: 26.2

Wednesday 22 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 2⁄4

    Answer: 13⁄14
  2. 2. Algebra

    Solve: 5x + 3 = 28

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Divide 108 in the ratio 4:1:4

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

    Calculate the mean of: 38, 26, 22, 49, 26, 12, 8

    Answer: 25.9

Thursday 23 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄8 + 3⁄8

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 3x - 20 = 25

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 13cm

    Answer: 17.03cm
  4. 4. Ratio

    Divide 128 in the ratio 1:3:4

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

    Find the mean of: 6, 10, 4, 7

    Answer: 6.75

Friday 24 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 2x - 14 = 4

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 4cm

    Answer: 7.21cm
  4. 4. Ratio

    Share 24 in the ratio 1:3

    Answer: 6 and 18
  5. 5. Statistics

    Calculate the mean of: 31, 8, 21, 43, 19, 9, 8

    Answer: 19.9