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Cornerstone Jan 20 - 26 25 questions
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Monday 20 January 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄9 + 1⁄9

    Answer: 4⁄9
  2. 2. Algebra

    Solve: 2x - 8 = 20

    Answer: x = 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 7.21cm
  4. 4. Ratio

    Divide 84 in the ratio 3:2:2

    Answer: 36, 24 and 24
  5. 5. Statistics

    Calculate the mean of: 7, 20, 34, 41, 17, 49, 16, 17. Give your answer to 2 decimal places

    Answer: 25.13

Tuesday 21 January 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄4 + 1⁄5

    Answer: 19⁄20
  2. 2. Algebra

    Solve: 3x + 14 = 32

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 261 in the ratio 2:4:3

    Answer: 58, 116 and 87
  5. 5. Statistics

    Find the mean of: 18, 15, 9, 11, 7

    Answer: 12

Wednesday 22 January 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra

    Solve: 5x + 7 = 62

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 18.6cm
  4. 4. Ratio

    Divide 144 in the ratio 3:1:4

    Answer: 54, 18 and 72
  5. 5. Statistics

    Find the mean of: 20, 9, 10

    Answer: 13

Thursday 23 January 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 1⁄4

    Answer: 19⁄28
  2. 2. Algebra

    Solve: 2x - 17 = 11

    Answer: x = 14
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Divide 120 in the ratio 1:1:2

    Answer: 30, 30 and 60
  5. 5. Statistics

    Calculate the mean of: 43, 28, 28, 8, 44, 5, 29, 6. Give your answer to 2 decimal places

    Answer: 23.88

Friday 24 January 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 1⁄3

    Answer: 11⁄15
  2. 2. Algebra

    Solve: 8x - 9 = 87

    Answer: x = 12
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Share 140 in the ratio 4:3

    Answer: 80 and 60
  5. 5. Statistics

    Find the mean of: 13, 9, 11, 19

    Answer: 13