Change pack
Cornerstone May 11 - 17 25 questions
PDF (questions) PDF (answers)

Monday 11 May 2026

Keystones #131 · Five questions · Open this day only

  1. 1. Number

    What is the HCF of 20 and 30?

    Answer: 10
  2. 2. Algebra

    If x = 9, find the value of 5x + 11

    Answer: 56
  3. 3. Geometry

    Find the circumference of a circle with diameter 12cm

    Answer: 37.7cm
  4. 4. Ratio

    What multiplier represents a 25% increase?

    Answer: 1.25
  5. 5. Statistics

    Find the mean, median and range of: 40, 21, 11, 15, 25

    Answer: Mean = 22.4, Median = 21, Range = 29

Tuesday 12 May 2026

Keystones #132 · Five questions · Open this day only

  1. 1. Number

    Find the HCF of 40 and 35

    Answer: 5
  2. 2. Algebra

    If x = 7, find the value of 3x + 11

    Answer: 32
  3. 3. Geometry

    Calculate the circumference of a circle with radius 8cm

    Answer: 50.27cm
  4. 4. Ratio

    What multiplier represents a 10% increase?

    Answer: 1.1
  5. 5. Statistics

    Find the mean, median and range of: 19, 30, 32, 20, 27

    Answer: Mean = 25.6, Median = 27, Range = 13

Wednesday 13 May 2026

Keystones #133 · Five questions · Open this day only

  1. 1. Number

    What is the HCF of 30 and 45?

    Answer: 15
  2. 2. Algebra

    If x = 5, calculate x² + 5x + 5

    Answer: 55
  3. 3. Geometry

    Find the circumference of a circle with diameter 4cm

    Answer: 12.57cm
  4. 4. Ratio

    What multiplier represents a 40% decrease?

    Answer: 0.6
  5. 5. Statistics

    Find the mean, mode, median and range of: 27, 27, 19, 14, 38

    Answer: Mean = 25, Mode = 27, Median = 27, Range = 24

Thursday 14 May 2026

Keystones #134 · Five questions · Open this day only

  1. 1. Number

    Find the HCF of 30 and 42

    Answer: 6
  2. 2. Algebra

    If x = 2, calculate x² + 2x + 6

    Answer: 14
  3. 3. Geometry

    Find the circumference of a circle with diameter 5cm

    Answer: 15.71cm
  4. 4. Ratio

    What multiplier represents a 33% decrease?

    Answer: 0.67
  5. 5. Statistics

    Find the mean, median and range of: 21, 30, 16, 40, 35

    Answer: Mean = 28.4, Median = 30, Range = 24

Friday 15 May 2026

Keystones #135 · Five questions · Open this day only

  1. 1. Number

    Find the HCF of 24 and 21

    Answer: 3
  2. 2. Algebra

    If x = 5, find the value of 2x + 4

    Answer: 14
  3. 3. Geometry

    Calculate the circumference of a circle with radius 6cm

    Answer: 37.7cm
  4. 4. Ratio

    What multiplier represents a 26% decrease?

    Answer: 0.74
  5. 5. Statistics

    Find the mean, mode, median and range of: 28, 36, 31, 31, 42

    Answer: Mean = 33.6, Mode = 31, Median = 31, Range = 14