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Cornerstone Jan 1 - 7 25 questions
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Monday 28 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 779 + 687

    Answer: 779 + 687 = 1466
  2. 2. Algebra

    Solve: x + 2 = 14

    Answer: x = 12
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 3cm, 4cm, 5cm

    Answer: 12cm
  4. 4. Ratio

    Find 77% of 217

    Answer: 167.09
  5. 5. Statistics

    Find the mean of: 9, 13, 13, 17, 20

    Answer: 14.4

Tuesday 29 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 65 + 68

    Answer: 65 + 68 = 133
  2. 2. Algebra

    Expand: 2(2x + 2)

    Answer: 4x + 4
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Find 48% of 423

    Answer: 203.04
  5. 5. Statistics

    Calculate the mean of: 45, 47, 6, 37, 49, 8, 10, 41

    Answer: 30.4

Wednesday 30 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 29 + 29

    Answer: 49
  2. 2. Algebra

    Solve: 8x = 24

    Answer: x = 3
  3. 3. Geometry

    Opposite = 7cm, hypotenuse = 8.cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify: 24:16:24

    Answer: 3:2:3
  5. 5. Statistics

    Calculate the mean of: 36, 8, 31, 43, 16, 26, 22

    Answer: 26

Thursday 1 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 41 + ? = 151

    Answer: 110
  2. 2. Algebra

    Solve: 4x + 9 = 3x + 13

    Answer: x = 4
  3. 3. Geometry

    Calculate the area of a circle with diameter 22cm

    Answer: 380.13cm²
  4. 4. Ratio

    Simplify: 24:20:20

    Answer: 6:5:5
  5. 5. Statistics

    Calculate the mean of: 38, 30, 24, 49, 9, 33, 45, 45

    Answer: 34.1

Friday 2 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 74 + 65

    Answer: 74 + 65 = 139
  2. 2. Algebra

    Find the next term: 25, 33, 41, 49, ...

    Answer: 57
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify: 18:18:6

    Answer: 3:3:1
  5. 5. Statistics

    Calculate the mean of: 34, 22, 19, 24, 39, 44, 15

    Answer: 28.1