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Cornerstone May 18 - 24 25 questions
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Monday 18 May 2026

Keystones #138 · Five questions · Open this day only

  1. 1. Number

    Divide: 3⁄7 ÷ 2⁄8

    Answer: 12⁄7
  2. 2. Algebra

    Solve: 4x + 3 < 38

    Answer: x < 8.8
  3. 3. Geometry

    Find the area of a right triangle with base 5cm and height 7cm

    Answer: 17.5cm²
  4. 4. Ratio

    If 7 items cost £63.00, how much do 9 items cost?

    Answer: £81.00
  5. 5. Statistics

    Find the mode of: 10, 10, 9, 12, 10, 15

    Answer: 10

Tuesday 19 May 2026

Keystones #139 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9⁄6 ÷ 5

    Answer: 3⁄10
  2. 2. Algebra

    Solve: 4x - 7 > 22

    Answer: x > 7.3
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 9cm and 9cm

    Answer: 40.5cm²
  4. 4. Ratio

    If 5 items cost £20.00, how much do 11 items cost?

    Answer: £44.00
  5. 5. Statistics

    What are the modes of: 39, 11, 22, 11, 25, 39

    Answer: 11 and 39

Wednesday 20 May 2026

Keystones #140 · Five questions · Open this day only

  1. 1. Number

    Divide: 2⁄3 ÷ 5⁄8

    Answer: 16⁄15
  2. 2. Algebra

    Solve: 4x - 9 > 29

    Answer: x > 9.5
  3. 3. Geometry

    Find the area of a right triangle with base 6cm and height 4cm

    Answer: 12cm²
  4. 4. Ratio

    If 3 items cost £12.00, how much do 5 items cost?

    Answer: £20.00
  5. 5. Statistics

    Find the mode of: 8, 8, 8, 15, 10, 6

    Answer: 8

Thursday 21 May 2026

Keystones #141 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄8 ÷ 3

    Answer: 1⁄3
  2. 2. Algebra

    Solve: 6x + 4 < 46

    Answer: x < 7
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 12cm and 13cm

    Answer: 78cm²
  4. 4. Ratio

    If 8 items cost £24.00, how much do 10 items cost?

    Answer: £30.00
  5. 5. Statistics

    What are the modes of: 24, 31, 30, 13, 30, 13

    Answer: 13 and 30

Friday 22 May 2026

Keystones #142 · Five questions · Open this day only

  1. 1. Number

    Divide: 1⁄5 ÷ 4⁄8

    Answer: 2⁄5
  2. 2. Algebra

    Solve: 3x + 5 < 45

    Answer: x < 13.3
  3. 3. Geometry

    Find the area of a right triangle with base 8cm and height 10cm

    Answer: 40cm²
  4. 4. Ratio

    If 7 items cost £28.00, how much do 8 items cost?

    Answer: £32.00
  5. 5. Statistics

    What are the modes of: 18, 19, 38, 33, 19, 38

    Answer: 19 and 38