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Cornerstone Nov 15 - 21 25 questions
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Monday 15 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 26 + 25

    Answer: 1115
  2. 2. Algebra

    Solve: 5x - 5 = 25

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 7cm

    Answer: 13.04cm
  4. 4. Ratio

    Divide 174 in the ratio 4:1:1

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

    Calculate the mean of: 16, 9, 37, 28, 26, 36, 44, 33

    Answer: 28.6

Tuesday 16 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 58 + 28

    Answer: 78
  2. 2. Algebra

    Solve: 6x - 13 = 17

    Answer: x = 5
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Divide 91 in the ratio 2:2:3

    Answer: 26, 26 and 39
  5. 5. Statistics

    Calculate the mean of: 23, 38, 34, 5, 19, 32

    Answer: 25.2

Wednesday 17 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 18 + 46

    Answer: 1924
  2. 2. Algebra

    Solve: 3x + 9 = 30

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 15cm

    Answer: 19.21cm
  4. 4. Ratio

    Divide 153 in the ratio 2:3:4

    Answer: 34, 51 and 68
  5. 5. Statistics

    Find the mean of: 12, 18, 17, 7

    Answer: 13.5

Thursday 18 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 48 + 14

    Answer: 34
  2. 2. Algebra

    Solve: 7x + 12 = 96

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 12cm

    Answer: 13.42cm
  4. 4. Ratio

    Divide 216 in the ratio 1:3:4

    Answer: 27, 81 and 108
  5. 5. Statistics

    Find the mean of: 15, 16, 3

    Answer: 11.333333333333

Friday 19 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 57 + 17

    Answer: 67
  2. 2. Algebra

    Solve: 7x - 10 = 39

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Divide 126 in the ratio 2:3:1

    Answer: 42, 63 and 21
  5. 5. Statistics

    Calculate the mean of: 30, 49, 7, 19, 33, 17, 23

    Answer: 25.4