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Cornerstone Jan 1 - 7 25 questions
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Monday 6 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 91 + ? = 105

    Answer: 14
  2. 2. Algebra

    Find the next term: 21, 30, 39, 48, ...

    Answer: 57
  3. 3. Geometry

    Opposite = 13cm, adjacent = 13cm. Calculate the angle

    Answer: 45°
  4. 4. Ratio

    Calculate 10% of 160

    Answer: 16
  5. 5. Statistics

    Calculate the mean of: 20, 40, 41, 47, 49, 48, 49

    Answer: 42

Tuesday 7 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄8 + 3⁄8

    Answer: 5⁄8
  2. 2. Algebra

    Expand: 6(5x + 8)

    Answer: 30x + 48
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 6.9cm. Find the angle

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

    Simplify the ratio 16:24

    Answer: 2:3
  5. 5. Statistics

    Find the mean of: 4, 14, 7

    Answer: 8.3333333333333

Wednesday 8 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    700000

    Answer: 7 × 105
  2. 2. Algebra

    Collect like terms: 2x + 3y + 3x + 8y

    Answer: 5x + 11y
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 6.9cm. Find the angle

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

    Simplify the ratio 24:8

    Answer: 3:1
  5. 5. Statistics

    Find the mean of: 7, 8, 8

    Answer: 7.6666666666667

Thursday 9 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 59 + ? = 188

    Answer: 129
  2. 2. Algebra

    Simplify: 6x + 7x

    Answer: 13x
  3. 3. Geometry

    Opposite = 16cm, adjacent = 17cm. Calculate the angle

    Answer: 43.3°
  4. 4. Ratio

    Simplify the ratio 15:40

    Answer: 3:8
  5. 5. Statistics

    Calculate the mean of: 16, 49, 18, 35, 38, 50, 22

    Answer: 32.6

Friday 10 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 156 + 499

    Answer: 156 + 499 = 655
  2. 2. Algebra

    Simplify: 2x + 4x

    Answer: 6x
  3. 3. Geometry

    Find the area of a circle with radius 9cm

    Answer: 254.47cm²
  4. 4. Ratio

    Calculate 25% of 126

    Answer: 31.5
  5. 5. Statistics

    Calculate the mean of: 23, 47, 6, 17, 41, 47, 16

    Answer: 28.1