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Cornerstone Feb 9 - 15 25 questions
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Monday 9 February 2026

Keystones #40 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄3 ÷ 4

    Answer: 1⁄12
  2. 2. Algebra

    Solve: 4x - 8 > 15

    Answer: x > 5.8
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 9cm and 10cm

    Answer: 45cm²
  4. 4. Ratio

    5 kg costs £42.20. What is the cost of 17 kg?

    Answer: £143.48
  5. 5. Statistics

    Find the mode of: 15, 14, 14, 7, 14, 6

    Answer: 14

Tuesday 10 February 2026

Keystones #41 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 ÷ 2

    Answer: 1⁄3
  2. 2. Algebra

    Solve: 2x - 6 > 11

    Answer: x > 8.5
  3. 3. Geometry

    Find the area of a right triangle with base 9cm and height 8cm

    Answer: 36cm²
  4. 4. Ratio

    4 kg costs £26.80. What is the cost of 20 kg?

    Answer: £134.00
  5. 5. Statistics

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

    Answer: 10

Wednesday 11 February 2026

Keystones #42 · Five questions · Open this day only

  1. 1. Number

    Divide: 5⁄8 ÷ 1⁄7

    Answer: 35⁄8
  2. 2. Algebra

    Solve: 3x + 5 < 45

    Answer: x < 13.3
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 9cm and 6cm

    Answer: 27cm²
  4. 4. Ratio

    7 kg costs £11.70. What is the cost of 12 kg?

    Answer: £20.06
  5. 5. Statistics

    What are the modes of: 37, 37, 17, 20, 20, 25

    Answer: 20 and 37

Thursday 12 February 2026

Keystones #43 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄6 ÷ 6

    Answer: 1⁄18
  2. 2. Algebra

    Solve: 6x + 8 < 42

    Answer: x < 5.7
  3. 3. Geometry

    Find the area of a right triangle with base 10cm and height 7cm

    Answer: 35cm²
  4. 4. Ratio

    9 kg costs £33.50. What is the cost of 24 kg?

    Answer: £89.33
  5. 5. Statistics

    What are the modes of: 17, 38, 29, 16, 17, 38

    Answer: 17 and 38

Friday 13 February 2026

Keystones #44 · Five questions · Open this day only

  1. 1. Number

    Divide: 1⁄6 ÷ 4⁄4

    Answer: 1⁄6
  2. 2. Algebra

    Solve: 5x - 5 > 31

    Answer: x > 7.2
  3. 3. Geometry

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

    Answer: 84.5cm²
  4. 4. Ratio

    8 kg costs £38.40. What is the cost of 17 kg?

    Answer: £81.60
  5. 5. Statistics

    Find the mode of: 13, 6, 9, 6, 15, 6

    Answer: 6