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Cornerstone Nov 2 - 8 25 questions
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Monday 2 November 2026

Keystones #306 · Five questions · Open this day only

  1. 1. Number

    Multiply: 1⁄7 × 1⁄5

    Answer: 1⁄35
  2. 2. Algebra

    Expand: 3(5x + 3)

    Answer: 15x + 9
  3. 3. Geometry

    Find b if a = 11cm and c = 22cm

    Answer: 19.05cm
  4. 4. Ratio

    In ratio 5:4, the difference between shares is 23. What are the shares?

    Answer: 115 and 92
  5. 5. Statistics

    Find the range of: 31, 25, 26, 25, 19

    Answer: 12

Tuesday 3 November 2026

Keystones #307 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄5 × 8

    Answer: 8
  2. 2. Algebra

    Expand: 3(x + 7)

    Answer: 3x + 21
  3. 3. Geometry

    Find b if a = 9cm and c = 14cm

    Answer: 10.72cm
  4. 4. Ratio

    In ratio 7:1, the difference between shares is 102. What are the shares?

    Answer: 119 and 17
  5. 5. Statistics

    Calculate the range of: 45, 47, 60, 73, 75, 45

    Answer: 30

Wednesday 4 November 2026

Keystones #308 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄7 × 6

    Answer: 36⁄7
  2. 2. Algebra

    Expand: 7(x + 6)

    Answer: 7x + 42
  3. 3. Geometry

    Find b if a = 14cm and c = 25cm

    Answer: 20.71cm
  4. 4. Ratio

    A and B share in ratio 8:7. If the difference is 36, what does A get?

    Answer: 288
  5. 5. Statistics

    Find the range of: 24, 27, 29, 19, 34

    Answer: 15

Thursday 5 November 2026

Keystones #309 · Five questions · Open this day only

  1. 1. Number

    Multiply: 2⁄3 × 5⁄6

    Answer: 5⁄9
  2. 2. Algebra

    Expand: 4(2x + 7)

    Answer: 8x + 28
  3. 3. Geometry

    Find b if a = 14cm and c = 17cm

    Answer: 9.64cm
  4. 4. Ratio

    A and B share in ratio 2:1. If the difference is 60, what does A get?

    Answer: 120
  5. 5. Statistics

    Calculate the range of: 64, 63, 95, 23, 44, 23

    Answer: 72

Friday 6 November 2026

Keystones #310 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄9 × 8

    Answer: 16⁄9
  2. 2. Algebra

    Expand: 6(6x + 4)

    Answer: 36x + 24
  3. 3. Geometry

    In a right triangle, if c = 5cm and a = 3cm, find b

    Answer: 4cm
  4. 4. Ratio

    A and B share in ratio 8:3. If the difference is 160, what does A get?

    Answer: 256
  5. 5. Statistics

    Calculate the range of: 57, 42, 39, 94, 27, 92

    Answer: 67