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Cornerstone Dec 3 - 9 25 questions
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Monday 3 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄7 + 6⁄8

    Answer: 41⁄28
  2. 2. Algebra

    Solve: 8x - 11 = 37

    Answer: x = 6
  3. 3. Geometry

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

    Answer: 41cm
  4. 4. Ratio

    Divide 175 in the ratio 3:3:1

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

    Calculate the mean of: 45, 18, 36, 11, 6, 18, 33, 9

    Answer: 22

Tuesday 4 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄4 + 1⁄5

    Answer: 19⁄20
  2. 2. Algebra

    Solve: 2x - 9 = 15

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Share 25 in the ratio 3:2

    Answer: 15 and 10
  5. 5. Statistics

    Find the mean of: 20, 19, 4, 3

    Answer: 11.5

Wednesday 5 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7⁄12 + 4⁄12

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 4x + 15 = 47

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 14cm

    Answer: 15.65cm
  4. 4. Ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics

    Calculate the mean of: 15, 46, 12, 15, 31, 35, 30

    Answer: 26.3

Thursday 6 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄6 + 3⁄5

    Answer: 14⁄15
  2. 2. Algebra

    Solve: 4x + 8 = 52

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Share 36 in the ratio 1:3

    Answer: 9 and 27
  5. 5. Statistics

    Calculate the mean of: 12, 32, 15, 45, 39, 32, 18

    Answer: 27.6

Friday 7 December 2018

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄7 + 3⁄7

    Answer: 4⁄7
  2. 2. Algebra

    Solve: 5x - 20 = 25

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 8cm

    Answer: 12.81cm
  4. 4. Ratio

    Share 35 in the ratio 2:3

    Answer: 14 and 21
  5. 5. Statistics

    Find the mean of: 19, 19, 6

    Answer: 14.666666666667