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Cornerstone Apr 19 - 25 25 questions
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Monday 19 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 8x - 5 = 75

    Answer: x = 10
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Divide 225 in the ratio 3:2:4

    Answer: 75, 50 and 100
  5. 5. Statistics

    Find the mean of: 2, 13, 18, 16

    Answer: 12.25

Tuesday 20 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄7 + 2⁄3

    Answer: 20⁄21
  2. 2. Algebra

    Solve: 2x - 17 = -9

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 12.81cm
  4. 4. Ratio

    Divide 176 in the ratio 2:3:3

    Answer: 44, 66 and 66
  5. 5. Statistics

    Calculate the mean of: 21, 36, 19, 28, 8, 48, 50

    Answer: 30

Wednesday 21 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄12 + 2⁄12

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 6x + 10 = 76

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 5cm
  4. 4. Ratio

    Divide 216 in the ratio 4:1:4

    Answer: 96, 24 and 96
  5. 5. Statistics

    Find the mean of: 11, 3, 15

    Answer: 9.6666666666667

Thursday 22 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄4 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra

    Solve: 4x + 4 = 36

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 4cm

    Answer: 6.4cm
  4. 4. Ratio

    Divide 154 in the ratio 3:3:1

    Answer: 66, 66 and 22
  5. 5. Statistics

    Find the mean of: 9, 13, 18, 2

    Answer: 10.5

Friday 23 April 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄8 + 2⁄8

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 3x - 20 = 19

    Answer: x = 13
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Divide 112 in the ratio 1:3:3

    Answer: 16, 48 and 48
  5. 5. Statistics

    Calculate the mean of: 38, 34, 35, 44, 37, 20, 42

    Answer: 35.7