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Cornerstone Dec 23 - 29 25 questions
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Monday 23 December 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra

    Solve: 6x - 16 = 50

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 29cm
  4. 4. Ratio

    Divide 112 in the ratio 1:1:2

    Answer: 28, 28 and 56
  5. 5. Statistics

    Find the mean of: 9, 11, 13

    Answer: 11

Tuesday 24 December 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄5 + 3⁄6

    Answer: 13⁄10
  2. 2. Algebra

    Solve: 8x - 20 = 76

    Answer: x = 12
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio

    Share 96 in the ratio 2:1

    Answer: 64 and 32
  5. 5. Statistics

    Calculate the mean of: 12, 26, 48, 37, 24, 30

    Answer: 29.5

Wednesday 25 December 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra

    Solve: 7x + 15 = 78

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 13cm

    Answer: 14.32cm
  4. 4. Ratio

    Share 80 in the ratio 3:1

    Answer: 60 and 20
  5. 5. Statistics

    Find the mean of: 11, 17, 15, 4

    Answer: 11.75

Thursday 26 December 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra

    Solve: 4x + 6 = 22

    Answer: x = 4
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Share 30 in the ratio 2:3

    Answer: 12 and 18
  5. 5. Statistics

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

    Answer: 11.25

Friday 27 December 2019

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 4x - 18 = 26

    Answer: x = 11
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 7cm

    Answer: 7.62cm
  4. 4. Ratio

    Share 21 in the ratio 2:1

    Answer: 14 and 7
  5. 5. Statistics

    Calculate the mean of: 23, 7, 38, 9, 33, 31, 42, 26

    Answer: 26.1