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Cornerstone Jan 6 - 12 25 questions
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Monday 6 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄5 + 3⁄7

    Answer: 22⁄35
  2. 2. Algebra

    Solve: 5x + 12 = 72

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 7cm

    Answer: 9.22cm
  4. 4. Ratio

    Share 44 in the ratio 1:3

    Answer: 11 and 33
  5. 5. Statistics

    Calculate the mean of: 14, 5, 49, 15, 14, 40, 47

    Answer: 26.3

Tuesday 7 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄12 + 3⁄12

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 7x - 6 = 29

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 25 in the ratio 3:2

    Answer: 15 and 10
  5. 5. Statistics

    Find the mean of: 11, 15, 11, 5, 11

    Answer: 10.6

Wednesday 8 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄9 + 2⁄9

    Answer: 5⁄9
  2. 2. Algebra

    Solve: 6x - 5 = 31

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Share 48 in the ratio 2:1

    Answer: 32 and 16
  5. 5. Statistics

    Find the mean of: 18, 7, 8, 5

    Answer: 9.5

Thursday 9 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 2⁄5

    Answer: 11⁄15
  2. 2. Algebra

    Solve: 4x + 10 = 30

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 8cm

    Answer: 8.94cm
  4. 4. Ratio

    Share 35 in the ratio 4:1

    Answer: 28 and 7
  5. 5. Statistics

    Calculate the mean of: 44, 37, 11, 47, 27, 35

    Answer: 33.5

Friday 10 January 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 7⁄8

    Answer: 73⁄56
  2. 2. Algebra

    Solve: 7x + 8 = 71

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 37cm
  4. 4. Ratio

    Share 70 in the ratio 3:4

    Answer: 30 and 40
  5. 5. Statistics

    Calculate the mean of: 37, 44, 41, 11, 36, 10

    Answer: 29.8