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Cornerstone Jan 1 - 7 25 questions
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Monday 27 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 44 × 44

    Answer: 48
  2. 2. Algebra

    Find the next term: 18, 28, 38, 48, ...

    Answer: 58
  3. 3. Geometry

    Opposite = 8cm, hypotenuse = 11.3cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Simplify: 18:18:6

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

    Find the mean of: 17, 19, 8, 10

    Answer: 13.5

Tuesday 28 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3 + 2

    Answer: 5
  2. 2. Algebra

    Factorise: 25x + 35

    Answer: 5(5x + 7)
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Simplify: 10:4:12

    Answer: 5:2:6
  5. 5. Statistics

    Find the mean of: 8, 3, 5

    Answer: 5.3333333333333

Wednesday 29 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 203, 252, and 130

    Answer: 585
  2. 2. Algebra

    What is the next term? 5, 10, 20, 40, ...

    Answer: 80
  3. 3. Geometry

    Calculate the area of a circle with diameter 24cm

    Answer: 452.39cm²
  4. 4. Ratio

    Simplify: 15:18:18

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

    Calculate the range of: 83, 112, 67, 40, 96, 73

    Answer: 72

Thursday 30 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 168, 285, and 51

    Answer: 504
  2. 2. Algebra

    Solve: 4x = 36

    Answer: x = 9
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 21.2cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Simplify: 20:24:24

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

    Calculate the range of: 35, 44, 32, 91, 51, 68

    Answer: 59

Friday 1 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 81 + ? = 125

    Answer: 44
  2. 2. Algebra

    Expand: 6(3x + 9)

    Answer: 18x + 54
  3. 3. Geometry

    Opposite = 5cm, hypotenuse = 10cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Simplify: 8:6:8

    Answer: 4:3:4
  5. 5. Statistics

    Find the mean of: 20, 11, 2, 2, 20

    Answer: 11