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Cornerstone Aug 11 - 17 25 questions
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Monday 11 August 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄7 + 1⁄6

    Answer: 43⁄42
  2. 2. Algebra

    Solve: 5x - 20 = 55

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 96 in the ratio 3:1:2

    Answer: 48, 16 and 32
  5. 5. Statistics

    Find the mean of: 18, 5, 20, 4, 13

    Answer: 12

Tuesday 12 August 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄10 + 5⁄10

    Answer: 7⁄10
  2. 2. Algebra

    Solve: 7x - 6 = 22

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 15.23cm
  4. 4. Ratio

    Divide 140 in the ratio 2:1:4

    Answer: 40, 20 and 80
  5. 5. Statistics

    Find the mean of: 14, 4, 13, 3, 6

    Answer: 8

Wednesday 13 August 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra

    Solve: 5x + 5 = 50

    Answer: x = 9
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Divide 150 in the ratio 3:2:1

    Answer: 75, 50 and 25
  5. 5. Statistics

    Calculate the mean of: 47, 20, 38, 29, 26, 42, 15

    Answer: 31

Thursday 14 August 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄7 + 4⁄5

    Answer: 58⁄35
  2. 2. Algebra

    Solve: 5x + 10 = 30

    Answer: x = 4
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio

    Share 60 in the ratio 3:1

    Answer: 45 and 15
  5. 5. Statistics

    Find the mean of: 20, 13, 6

    Answer: 13

Friday 15 August 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄11 + 2⁄11

    Answer: 6⁄11
  2. 2. Algebra

    Solve: 6x - 15 = 51

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.87cm
  4. 4. Ratio

    Share 133 in the ratio 4:3

    Answer: 76 and 57
  5. 5. Statistics

    Calculate the mean of: 28, 34, 6, 25, 32, 14. Give your answer to 2 decimal places

    Answer: 23.17