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Lintel Jul 6 - 12 25 questions
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Monday 6 July 2026

Keystones #187 · Five questions · Open this day only

  1. 1. Number

    Round 6560 to 2 significant figures

    Answer: 6600
  2. 2. Algebra

    Determine the nth term rule: 0, 4, 8, 12, 16, ...

    Answer: 4n + -4
  3. 3. Geometry

    Calculate area: sides 10cm and 14cm, included angle 30°

    Answer: 35cm²
  4. 4. Ratio

    If 6 items cost £27.00, how many items can you buy for £32.70?

    Answer: 7.3 items
  5. 5. Statistics

    Find the mode of: 70, 58, 30, 44, 19

    Answer: No mode

Tuesday 7 July 2026

Keystones #188 · Five questions · Open this day only

  1. 1. Number

    Round 32.119 to 3 significant figures

    Answer: 32.1
  2. 2. Algebra

    Find the nth term: 35, 31, 27, 23, ...

    Answer: 39 - 4n
  3. 3. Geometry

    Find area of triangle: a = 29cm, b = 23cm, angle = 58°

    Answer: 282.8cm²
  4. 4. Ratio

    If 10 items cost £20.50, how many items can you buy for £37.40?

    Answer: 18.2 items
  5. 5. Statistics

    What are the modes of: 18, 39, 39, 19, 27, 18

    Answer: 18 and 39

Wednesday 8 July 2026

Keystones #189 · Five questions · Open this day only

  1. 1. Number

    Round 12.404 to 3 significant figures

    Answer: 12.4
  2. 2. Algebra

    Find the nth term: 22, 16, 10, 4, ...

    Answer: 28 - 6n
  3. 3. Geometry

    Find area of triangle: a = 12cm, b = 12cm, angle = 51°

    Answer: 56cm²
  4. 4. Ratio

    If 8 items cost £22.10, how many items can you buy for £49.00?

    Answer: 17.7 items
  5. 5. Statistics

    What are the modes of: 15, 34, 27, 34, 19, 19

    Answer: 19 and 34

Thursday 9 July 2026

Keystones #190 · Five questions · Open this day only

  1. 1. Number

    Round 4090 to 2 significant figures

    Answer: 4100
  2. 2. Algebra

    Determine the nth term rule: 2, 7, 12, 17, 22, ...

    Answer: 5n + -3
  3. 3. Geometry

    Calculate area: sides 11cm and 12cm, included angle 30°

    Answer: 33cm²
  4. 4. Ratio

    If 9 items cost £18.00, how many items can you buy for £45.40?

    Answer: 22.7 items
  5. 5. Statistics

    Find the mode of: 63, 76, 45, 34, 13

    Answer: No mode

Friday 10 July 2026

Keystones #191 · Five questions · Open this day only

  1. 1. Number

    Round 5387 to 2 significant figures

    Answer: 5400
  2. 2. Algebra

    Determine the nth term rule: 3, 9, 15, 21, 27, ...

    Answer: 6n + -3
  3. 3. Geometry

    Find area of triangle: a = 23cm, b = 13cm, angle = 74°

    Answer: 143.7cm²
  4. 4. Ratio

    If 9 items cost £27.50, how many items can you buy for £45.80?

    Answer: 15 items
  5. 5. Statistics

    Find the mode of: 42, 33, 17, 76, 55

    Answer: No mode