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Cornerstone Jun 8 - 14 25 questions
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Monday 8 June 2026

Keystones #159 · Five questions · Open this day only

  1. 1. Number

    Multiply: 1⁄6 × 1⁄7

    Answer: 1⁄42
  2. 2. Algebra

    Expand: 3(4x + 8)

    Answer: 12x + 24
  3. 3. Geometry

    In a right triangle, if c = 10cm and a = 6cm, find b

    Answer: 8cm
  4. 4. Ratio

    A and B share in ratio 7:4. If the difference is 120, what does A get?

    Answer: 280
  5. 5. Statistics

    Calculate the range of: 63, 55, 41, 51, 24, 75

    Answer: 51

Tuesday 9 June 2026

Keystones #160 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄9 × 5

    Answer: 10⁄9
  2. 2. Algebra

    Expand: 6(x + 9)

    Answer: 6x + 54
  3. 3. Geometry

    Find b if a = 13cm and c = 23cm

    Answer: 18.97cm
  4. 4. Ratio

    A and B share in ratio 2:1. If the difference is 44, what does A get?

    Answer: 88
  5. 5. Statistics

    Find the range of: 41, 33, 40, 16, 22

    Answer: 25

Wednesday 10 June 2026

Keystones #161 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄10 × 2

    Answer: 1⁄5
  2. 2. Algebra

    Expand: 9(x + 6)

    Answer: 9x + 54
  3. 3. Geometry

    In a right triangle, if c = 13cm and a = 5cm, find b

    Answer: 12cm
  4. 4. Ratio

    A and B share in ratio 5:1. If the difference is 88, what does A get?

    Answer: 110
  5. 5. Statistics

    Find the range of: 21, 24, 33, 26, 11

    Answer: 22

Thursday 11 June 2026

Keystones #162 · Five questions · Open this day only

  1. 1. Number

    Multiply: 5⁄3 × 5⁄8

    Answer: 25⁄24
  2. 2. Algebra

    Expand: 5(4x + 5)

    Answer: 20x + 25
  3. 3. Geometry

    Find b if a = 13cm and c = 18cm

    Answer: 12.45cm
  4. 4. Ratio

    A and B share in ratio 3:2. If the difference is 80, what does A get?

    Answer: 240
  5. 5. Statistics

    Calculate the range of: 86, 40, 48, 39, 64, 47

    Answer: 47

Friday 12 June 2026

Keystones #163 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄6 × 6

    Answer: 1
  2. 2. Algebra

    Expand: 4(2x + 4)

    Answer: 8x + 16
  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 2:1. If the difference is 63, what does A get?

    Answer: 126
  5. 5. Statistics

    Calculate the range of: 51, 30, 34, 29, 66, 30

    Answer: 37