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Cornerstone Dec 1 - 7 25 questions
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Monday 1 December 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 1⁄8

    Answer: 29⁄40
  2. 2. Algebra

    Solve: 2x + 11 = 23

    Answer: x = 6
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio

    Share 55 in the ratio 2:3

    Answer: 22 and 33
  5. 5. Statistics

    Calculate the mean of: 38, 35, 26, 14, 20, 43, 30, 28

    Answer: 29.25

Tuesday 2 December 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 4x + 15 = 63

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 10.63cm
  4. 4. Ratio

    Share 30 in the ratio 4:1

    Answer: 24 and 6
  5. 5. Statistics

    Calculate the mean of: 50, 12, 18, 23, 32, 45, 41, 45

    Answer: 33.25

Wednesday 3 December 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄7 + 4⁄8

    Answer: 11⁄14
  2. 2. Algebra

    Solve: 7x - 12 = 51

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 29cm
  4. 4. Ratio

    Share 35 in the ratio 4:1

    Answer: 28 and 7
  5. 5. Statistics

    Find the mean of: 10, 5, 9, 18, 8

    Answer: 10

Thursday 4 December 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄8 + 2⁄5

    Answer: 41⁄40
  2. 2. Algebra

    Solve: 3x - 20 = 16

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Divide 96 in the ratio 1:1:4

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

    Calculate the mean of: 36, 43, 38, 26, 24, 5, 14. Give your answer to 2 decimal places

    Answer: 26.57

Friday 5 December 2014

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 2x + 13 = 21

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 7.62cm
  4. 4. Ratio

    Divide 120 in the ratio 2:1:2

    Answer: 48, 24 and 48
  5. 5. Statistics

    Find the mean of: 3, 16, 17

    Answer: 12