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Cornerstone Jan 7 - 13 25 questions
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Monday 7 January 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄8 + 2⁄7

    Answer: 29⁄28
  2. 2. Algebra

    Solve: 2x + 12 = 36

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 12.04cm
  4. 4. Ratio

    Share 60 in the ratio 1:2

    Answer: 20 and 40
  5. 5. Statistics

    Calculate the mean of: 20, 28, 13, 30, 43, 35, 19, 36

    Answer: 28

Tuesday 8 January 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄7 + 4⁄8

    Answer: 11⁄14
  2. 2. Algebra

    Solve: 7x + 9 = 72

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 9.9cm
  4. 4. Ratio

    Share 120 in the ratio 2:1

    Answer: 80 and 40
  5. 5. Statistics

    Calculate the mean of: 46, 7, 14, 9, 40, 5, 50. Give your answer to 2 decimal places

    Answer: 24.43

Wednesday 9 January 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄11 + 4⁄11

    Answer: 9⁄11
  2. 2. Algebra

    Solve: 3x - 15 = 12

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Share 78 in the ratio 1:2

    Answer: 26 and 52
  5. 5. Statistics

    Find the mean of: 17, 5, 17

    Answer: 13

Thursday 10 January 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9⁄12 + 1⁄12

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 7x - 14 = 49

    Answer: x = 9
  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

    Share 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics

    Find the mean of: 2, 14, 5, 11

    Answer: 8

Friday 11 January 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄8 + 1⁄3

    Answer: 17⁄24
  2. 2. Algebra

    Solve: 3x + 6 = 15

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio

    Share 35 in the ratio 2:3

    Answer: 14 and 21
  5. 5. Statistics

    Calculate the mean of: 14, 49, 33, 35, 9, 34, 19, 5

    Answer: 24.75