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Cornerstone Feb 21 - 27 25 questions
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Monday 21 February 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 2⁄3

    Answer: 23⁄21
  2. 2. Algebra

    Solve: 4x - 15 = 9

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 119 in the ratio 4:2:1

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

    Calculate the mean of: 11, 40, 16, 32, 44, 5, 15. Give your answer to 2 decimal places

    Answer: 23.29

Tuesday 22 February 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄5 + 3⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 6x - 15 = 69

    Answer: x = 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 11.18cm
  4. 4. Ratio

    Divide 60 in the ratio 2:2:1

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

    Calculate the mean of: 35, 46, 25, 12, 47, 11, 27, 44. Give your answer to 2 decimal places

    Answer: 30.88

Wednesday 23 February 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 3⁄7

    Answer: 29⁄35
  2. 2. Algebra

    Solve: 4x + 12 = 36

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 90 in the ratio 3:2:1

    Answer: 45, 30 and 15
  5. 5. Statistics

    Find the mean of: 23, 16, 2, 15

    Answer: 14

Thursday 24 February 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄4 + 4⁄8

    Answer: 1⁄1
  2. 2. Algebra

    Solve: 4x + 5 = 25

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.55cm
  4. 4. Ratio

    Share 56 in the ratio 3:4

    Answer: 24 and 32
  5. 5. Statistics

    Calculate the mean of: 38, 28, 15, 40, 16, 40, 26, 25

    Answer: 28.5

Friday 25 February 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄9 + 3⁄9

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 5x - 9 = 36

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 11.31cm
  4. 4. Ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics

    Find the mean of: 9, 16, 2, 20, 3

    Answer: 10