Change pack
Cornerstone Mar 23 - 29 25 questions
PDF (questions) PDF (answers)

Monday 23 March 2026

Keystones #82 · Five questions · Open this day only

  1. 1. Number

    Find the HCF of 21 and 21

    Answer: 3
  2. 2. Algebra

    If x = 2, find the value of 4x + 8

    Answer: 16
  3. 3. Geometry

    Find the circumference of a circle with diameter 12cm

    Answer: 37.7cm
  4. 4. Ratio

    What multiplier represents a 20% increase?

    Answer: 1.2
  5. 5. Statistics

    Find the mean, mode, median and range of: 20, 40, 20, 22, 32

    Answer: Mean = 26.8, Mode = 20, Median = 22, Range = 20

Tuesday 24 March 2026

Keystones #83 · Five questions · Open this day only

  1. 1. Number

    Find the HCF of 20 and 12

    Answer: 4
  2. 2. Algebra

    If x = 4, find the value of 3x + 12

    Answer: 24
  3. 3. Geometry

    Calculate the circumference of a circle with radius 8cm

    Answer: 50.27cm
  4. 4. Ratio

    What multiplier represents a 36% decrease?

    Answer: 0.64
  5. 5. Statistics

    Find the mean, median and range of: 10, 33, 31, 23, 24

    Answer: Mean = 24.2, Median = 24, Range = 23

Wednesday 25 March 2026

Keystones #84 · Five questions · Open this day only

  1. 1. Number

    What is the HCF of 30 and 45?

    Answer: 15
  2. 2. Algebra

    If x = 3, calculate x² + 3x + 8

    Answer: 26
  3. 3. Geometry

    Calculate the circumference of a circle with radius 7cm

    Answer: 43.98cm
  4. 4. Ratio

    What multiplier represents a 17% decrease?

    Answer: 0.83
  5. 5. Statistics

    Find the mean, mode, median and range of: 29, 26, 21, 30, 26

    Answer: Mean = 26.4, Mode = 26, Median = 26, Range = 9

Thursday 26 March 2026

Keystones #85 · Five questions · Open this day only

  1. 1. Number

    Find the HCF of 12 and 30

    Answer: 6
  2. 2. Algebra

    If x = 5, calculate x² + 3x + 5

    Answer: 45
  3. 3. Geometry

    Find the circumference of a circle with diameter 4cm

    Answer: 12.57cm
  4. 4. Ratio

    What multiplier represents a 28% decrease?

    Answer: 0.72
  5. 5. Statistics

    Find the mean, mode, median and range of: 21, 18, 49, 37, 37

    Answer: Mean = 32.4, Mode = 37, Median = 37, Range = 31

Friday 27 March 2026

Keystones #86 · Five questions · Open this day only

  1. 1. Number

    What is the HCF of 12 and 18?

    Answer: 6
  2. 2. Algebra

    If x = 8, find the value of 8x + 3

    Answer: 67
  3. 3. Geometry

    Calculate the circumference of a circle with radius 5cm

    Answer: 31.42cm
  4. 4. Ratio

    What multiplier represents a 22% decrease?

    Answer: 0.78
  5. 5. Statistics

    Find the mean, median and range of: 15, 32, 30, 32, 18

    Answer: Mean = 25.4, Median = 30, Range = 17