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Cornerstone Dec 9 - 15 25 questions
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Monday 9 December 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 1⁄5

    Answer: 22⁄35
  2. 2. Algebra

    Solve: 4x - 15 = 45

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 108 in the ratio 3:2:4

    Answer: 36, 24 and 48
  5. 5. Statistics

    Find the mean of: 13, 3, 20

    Answer: 12

Tuesday 10 December 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 3⁄8

    Answer: 39⁄40
  2. 2. Algebra

    Solve: 7x - 6 = 85

    Answer: x = 13
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 7.81cm
  4. 4. Ratio

    Divide 84 in the ratio 4:1:2

    Answer: 48, 12 and 24
  5. 5. Statistics

    Find the mean of: 3, 14, 7

    Answer: 8

Wednesday 11 December 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄7 + 2⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 5x + 6 = 21

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio

    Divide 154 in the ratio 2:2:3

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

    Calculate the mean of: 26, 35, 38, 7, 22, 38, 8, 8

    Answer: 22.75

Thursday 12 December 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄6 + 1⁄7

    Answer: 10⁄21
  2. 2. Algebra

    Solve: 2x + 12 = 34

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 16.12cm
  4. 4. Ratio

    Divide 330 in the ratio 4:4:3

    Answer: 120, 120 and 90
  5. 5. Statistics

    Calculate the mean of: 31, 19, 15, 20, 12, 49, 17, 49

    Answer: 26.5

Friday 13 December 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 3x - 19 = -7

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 8.6cm
  4. 4. Ratio

    Divide 261 in the ratio 2:3:4

    Answer: 58, 87 and 116
  5. 5. Statistics

    Find the mean of: 11, 18, 6, 13

    Answer: 12