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Cornerstone Sep 20 - 26 25 questions
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Monday 20 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 7x + 6 = 69

    Answer: x = 9
  3. 3. Geometry

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

    Answer: 39cm
  4. 4. Ratio

    Divide 96 in the ratio 3:3:2

    Answer: 36, 36 and 24
  5. 5. Statistics

    Calculate the mean of: 6, 45, 38, 37, 11, 31, 42, 18

    Answer: 28.5

Tuesday 21 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄8 + 3⁄4

    Answer: 9⁄8
  2. 2. Algebra

    Solve: 5x - 7 = 53

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio

    Divide 210 in the ratio 2:1:2

    Answer: 84, 42 and 84
  5. 5. Statistics

    Find the mean of: 20, 3, 20, 3

    Answer: 11.5

Wednesday 22 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 2x - 6 = 4

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Divide 264 in the ratio 4:4:3

    Answer: 96, 96 and 72
  5. 5. Statistics

    Find the mean of: 5, 12, 16, 15

    Answer: 12

Thursday 23 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄4 + 1⁄5

    Answer: 19⁄20
  2. 2. Algebra

    Solve: 2x + 9 = 17

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 15cm

    Answer: 16.16cm
  4. 4. Ratio

    Divide 119 in the ratio 1:3:3

    Answer: 17, 51 and 51
  5. 5. Statistics

    Calculate the mean of: 12, 27, 34, 30, 22, 34

    Answer: 26.5

Friday 24 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra

    Solve: 7x + 8 = 29

    Answer: x = 3
  3. 3. Geometry

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

    Answer: 14.14cm
  4. 4. Ratio

    Share 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics

    Find the mean of: 20, 15, 4, 9, 18

    Answer: 13.2