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Cornerstone Apr 12 - 18 25 questions
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Monday 12 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄7 + 2⁄5

    Answer: 19⁄35
  2. 2. Algebra

    Solve: 5x - 11 = 19

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 6cm

    Answer: 9.22cm
  4. 4. Ratio

    Share 75 in the ratio 4:1

    Answer: 60 and 15
  5. 5. Statistics

    Calculate the mean of: 7, 18, 31, 34, 8, 38

    Answer: 22.7

Tuesday 13 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 5x + 9 = 59

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 5cm
  4. 4. Ratio

    Share 63 in the ratio 3:4

    Answer: 27 and 36
  5. 5. Statistics

    Find the mean of: 17, 8, 18, 17

    Answer: 15

Wednesday 14 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 10⁄12 + 1⁄12

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 5x + 5 = 30

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio

    Divide 120 in the ratio 4:1:1

    Answer: 80, 20 and 20
  5. 5. Statistics

    Calculate the mean of: 9, 45, 46, 19, 48, 26, 22

    Answer: 30.7

Thursday 15 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄8 + 2⁄7

    Answer: 15⁄28
  2. 2. Algebra

    Solve: 3x - 19 = 26

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio

    Divide 133 in the ratio 2:4:1

    Answer: 38, 76 and 19
  5. 5. Statistics

    Find the mean of: 13, 10, 3, 3, 13

    Answer: 8.4

Friday 16 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄11 + 1⁄11

    Answer: 3⁄11
  2. 2. Algebra

    Solve: 2x - 19 = 3

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio

    Divide 200 in the ratio 4:1:3

    Answer: 100, 25 and 75
  5. 5. Statistics

    Find the mean of: 13, 3, 11, 4, 12

    Answer: 8.6