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Cornerstone Jun 1 - 7 25 questions
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Monday 1 June 2026

Keystones #152 · Five questions · Open this day only

  1. 1. Number

    Calculate: -4 × -2 + -9

    Answer: -1
  2. 2. Algebra

    Find the nth term: 21, 19, 17, 15, ...

    Answer: 23 - 2n
  3. 3. Geometry

    Find the area of a circle with radius 5cm

    Answer: 78.54cm²
  4. 4. Ratio

    A price falls from £147.00 to £116.00. Calculate the percentage decrease

    Answer: 21.1%
  5. 5. Statistics

    Calculate the median of: 35, 33, 33, 37, 36, 13

    Answer: 34

Tuesday 2 June 2026

Keystones #153 · Five questions · Open this day only

  1. 1. Number

    Calculate: -9 + 8 - 2

    Answer: -3
  2. 2. Algebra

    Find the nth term: 30, 28, 26, 24, ...

    Answer: 32 - 2n
  3. 3. Geometry

    Calculate the area of a circle with diameter 9cm

    Answer: 63.62cm²
  4. 4. Ratio

    A price falls from £274.00 to £202.00. Calculate the percentage decrease

    Answer: 26.3%
  5. 5. Statistics

    Calculate the median of: 35, 18, 35, 16, 17, 25

    Answer: 21.5

Wednesday 3 June 2026

Keystones #154 · Five questions · Open this day only

  1. 1. Number

    Calculate: -1 × 0 + 9

    Answer: 9
  2. 2. Algebra

    Find the nth term rule for: 12, 15, 18, 21, ...

    Answer: 3n + 9
  3. 3. Geometry

    Find the area of a circle with radius 7cm

    Answer: 153.94cm²
  4. 4. Ratio

    A price falls from £123.00 to £53.00. Calculate the percentage decrease

    Answer: 56.9%
  5. 5. Statistics

    Find the median of: 19, 17, 14, 5, 6

    Answer: 14

Thursday 4 June 2026

Keystones #155 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2 × -5 + -4

    Answer: -14
  2. 2. Algebra

    Find the nth term rule for: 12, 16, 20, 24, ...

    Answer: 4n + 8
  3. 3. Geometry

    Find the area of a circle with radius 6cm

    Answer: 113.cm²
  4. 4. Ratio

    A value increases from 193 to 222. What is the percentage change?

    Answer: 15%
  5. 5. Statistics

    Calculate the median of: 23, 40, 31, 39, 12, 23

    Answer: 27

Friday 5 June 2026

Keystones #156 · Five questions · Open this day only

  1. 1. Number

    Calculate: -8 + 6 - -3

    Answer: 1
  2. 2. Algebra

    Find the nth term: 31, 26, 21, 16, ...

    Answer: 36 - 5n
  3. 3. Geometry

    Calculate the area of a circle with diameter 15cm

    Answer: 176.71cm²
  4. 4. Ratio

    A value increases from 136 to 190. What is the percentage change?

    Answer: 39.7%
  5. 5. Statistics

    Find the median of: 14, 11, 10, 20, 20

    Answer: 14