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Cornerstone Apr 20 - 26 25 questions
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Monday 20 April 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄8 + 1⁄8

    Answer: 1⁄4
  2. 2. Algebra

    Solve: 2x - 7 = 23

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 9.22cm
  4. 4. Ratio

    Divide 150 in the ratio 2:2:1

    Answer: 60, 60 and 30
  5. 5. Statistics

    Calculate the mean of: 19, 17, 41, 9, 16, 30, 31, 39

    Answer: 25.3

Tuesday 21 April 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 7⁄8 + 1⁄4

    Answer: 9⁄8
  2. 2. Algebra

    Solve: 4x + 9 = 21

    Answer: x = 3
  3. 3. Geometry

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

    Answer: 20cm
  4. 4. Ratio

    Divide 280 in the ratio 3:3:4

    Answer: 84, 84 and 112
  5. 5. Statistics

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

    Answer: 12.5

Wednesday 22 April 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra

    Solve: 3x + 7 = 16

    Answer: x = 3
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 8cm

    Answer: 13.6cm
  4. 4. Ratio

    Divide 174 in the ratio 4:1:1

    Answer: 116, 29 and 29
  5. 5. Statistics

    Find the mean of: 12, 10, 14

    Answer: 12

Thursday 23 April 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄3 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra

    Solve: 3x - 11 = 34

    Answer: x = 15
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Divide 175 in the ratio 2:2:3

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

    Calculate the mean of: 22, 33, 14, 24, 35, 42, 50, 7

    Answer: 28.4

Friday 24 April 2020

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄6 + 2⁄3

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 6x - 18 = 36

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 25cm
  4. 4. Ratio

    Share 30 in the ratio 3:2

    Answer: 18 and 12
  5. 5. Statistics

    Find the mean of: 9, 9, 12, 3, 8

    Answer: 8.2