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Cornerstone May 17 - 23 25 questions
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Monday 17 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄7 + 6⁄8

    Answer: 33⁄28
  2. 2. Algebra

    Solve: 8x - 10 = 38

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 8cm

    Answer: 9.43cm
  4. 4. Ratio

    Share 55 in the ratio 4:1

    Answer: 44 and 11
  5. 5. Statistics

    Calculate the mean of: 26, 15, 46, 25, 34, 10

    Answer: 26

Tuesday 18 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 6⁄7

    Answer: 31⁄28
  2. 2. Algebra

    Solve: 5x - 17 = 58

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 4cm

    Answer: 9.85cm
  4. 4. Ratio

    Share 72 in the ratio 3:1

    Answer: 54 and 18
  5. 5. Statistics

    Calculate the mean of: 23, 22, 35, 6, 25, 24, 46, 29

    Answer: 26.3

Wednesday 19 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 5x + 9 = 34

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 29cm
  4. 4. Ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics

    Find the mean of: 2, 15, 18

    Answer: 11.666666666667

Thursday 20 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 1⁄6

    Answer: 17⁄30
  2. 2. Algebra

    Solve: 7x + 8 = 57

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 8cm

    Answer: 10.63cm
  4. 4. Ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics

    Calculate the mean of: 36, 8, 11, 15, 26, 22

    Answer: 19.7

Friday 21 May 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄12 + 2⁄12

    Answer: 7⁄12
  2. 2. Algebra

    Solve: 2x - 19 = -3

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Share 72 in the ratio 1:2

    Answer: 24 and 48
  5. 5. Statistics

    Find the mean of: 6, 7, 9, 16, 18

    Answer: 11.2