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Cornerstone Dec 7 - 13 25 questions
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Monday 7 December 2015

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra

    Solve: 3x - 13 = 20

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.04cm
  4. 4. Ratio

    Divide 70 in the ratio 3:1:3

    Answer: 30, 10 and 30
  5. 5. Statistics

    Calculate the mean of: 40, 27, 36, 17, 43, 19, 34, 15. Give your answer to 2 decimal places

    Answer: 28.88

Tuesday 8 December 2015

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra

    Solve: 4x - 7 = 53

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 14.21cm
  4. 4. Ratio

    Divide 130 in the ratio 2:2:1

    Answer: 52, 52 and 26
  5. 5. Statistics

    Calculate the mean of: 8, 16, 33, 20, 29, 13. Give your answer to 2 decimal places

    Answer: 19.83

Wednesday 9 December 2015

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 6x + 9 = 81

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Divide 144 in the ratio 1:4:1

    Answer: 24, 96 and 24
  5. 5. Statistics

    Find the mean of: 19, 7, 10

    Answer: 12

Thursday 10 December 2015

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 3x + 11 = 41

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio

    Divide 80 in the ratio 1:1:2

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

    Find the mean of: 6, 17, 16, 17

    Answer: 14

Friday 11 December 2015

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄8 + 5⁄6

    Answer: 23⁄24
  2. 2. Algebra

    Solve: 5x - 12 = 18

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Divide 112 in the ratio 1:2:4

    Answer: 16, 32 and 64
  5. 5. Statistics

    Calculate the mean of: 43, 16, 34, 28, 35, 32, 18. Give your answer to 2 decimal places

    Answer: 29.43