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Cornerstone Mar 11 - 17 25 questions
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Monday 11 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 1⁄4

    Answer: 13⁄20
  2. 2. Algebra

    Solve: 3x - 16 = 20

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 12.08cm
  4. 4. Ratio

    Share 126 in the ratio 3:4

    Answer: 54 and 72
  5. 5. Statistics

    Calculate the mean of: 19, 15, 30, 45, 28, 32, 5, 31. Give your answer to 2 decimal places

    Answer: 25.63

Tuesday 12 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 3x - 15 = 9

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 48 in the ratio 1:2

    Answer: 16 and 32
  5. 5. Statistics

    Calculate the mean of: 17, 29, 19, 24, 26, 12, 30. Give your answer to 2 decimal places

    Answer: 22.43

Wednesday 13 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄6 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra

    Solve: 6x + 8 = 50

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio

    Share 120 in the ratio 1:2

    Answer: 40 and 80
  5. 5. Statistics

    Find the mean of: 20, 4, 12

    Answer: 12

Thursday 14 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄4 + 1⁄3

    Answer: 13⁄12
  2. 2. Algebra

    Solve: 7x + 12 = 47

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 15cm

    Answer: 17cm
  4. 4. Ratio

    Divide 250 in the ratio 4:3:3

    Answer: 100, 75 and 75
  5. 5. Statistics

    Calculate the mean of: 28, 21, 26, 20, 6, 30, 45, 45. Give your answer to 2 decimal places

    Answer: 27.63

Friday 15 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄9 + 5⁄9

    Answer: 7⁄9
  2. 2. Algebra

    Solve: 5x - 9 = 36

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Divide 176 in the ratio 4:3:4

    Answer: 64, 48 and 64
  5. 5. Statistics

    Find the mean of: 10, 6, 8

    Answer: 8