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Cornerstone Sep 5 - 11 25 questions
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Monday 5 September 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄6 + 5⁄7

    Answer: 17⁄14
  2. 2. Algebra

    Solve: 2x + 4 = 20

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 189 in the ratio 2:1:4

    Answer: 54, 27 and 108
  5. 5. Statistics

    Find the mean of: 20, 12, 16, 11, 16

    Answer: 15

Tuesday 6 September 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄11 + 6⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 7x + 7 = 49

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio

    Divide 128 in the ratio 3:2:3

    Answer: 48, 32 and 48
  5. 5. Statistics

    Find the mean of: 13, 18, 8

    Answer: 13

Wednesday 7 September 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 7⁄8

    Answer: 9⁄8
  2. 2. Algebra

    Solve: 5x - 19 = 6

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 108 in the ratio 1:1:2

    Answer: 27, 27 and 54
  5. 5. Statistics

    Calculate the mean of: 49, 48, 50, 16, 44, 37. Give your answer to 2 decimal places

    Answer: 40.67

Thursday 8 September 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄6 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra

    Solve: 7x - 20 = 71

    Answer: x = 13
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Divide 240 in the ratio 3:1:4

    Answer: 90, 30 and 120
  5. 5. Statistics

    Calculate the mean of: 37, 39, 27, 21, 25, 7, 30. Give your answer to 2 decimal places

    Answer: 26.57

Friday 9 September 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄9 + 3⁄9

    Answer: 8⁄9
  2. 2. Algebra

    Solve: 5x + 12 = 47

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.52cm
  4. 4. Ratio

    Divide 130 in the ratio 2:1:2

    Answer: 52, 26 and 52
  5. 5. Statistics

    Find the mean of: 2, 24, 18, 12

    Answer: 14