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Cornerstone Jun 11 - 17 25 questions
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Monday 8 June 2026

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 51 + 65

    Answer: 51 + 65 = 116
  2. 2. Algebra

    What is the next term? 4, 12, 36, 108, ...

    Answer: 324
  3. 3. Geometry

    Opposite = 14cm, hypotenuse = 19.8cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Simplify: 9:18:6

    Answer: 3:6:2
  5. 5. Statistics

    Calculate the mean of: 12, 41, 24, 10, 30, 8, 21

    Answer: 20.9

Tuesday 9 June 2026

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 638 + 294

    Answer: 638 + 294 = 932
  2. 2. Algebra

    Find the next term: 12, 20, 28, 36, ...

    Answer: 44
  3. 3. Geometry

    Calculate the area of a circle with diameter 12cm

    Answer: 113.cm²
  4. 4. Ratio

    Simplify: 6:10:8

    Answer: 3:5:4
  5. 5. Statistics

    Find the mean of: 3, 16, 10, 2, 9

    Answer: 8

Wednesday 10 June 2026

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 62 + ? = 144

    Answer: 82
  2. 2. Algebra

    Solve: 8x + 6 = x + 48

    Answer: x = 6
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Find 55% of 280

    Answer: 154
  5. 5. Statistics

    Find the range of: 30, 13, 19, 34, 20

    Answer: 21

Thursday 11 June 2026

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 92 + 29

    Answer: 92 + 29 = 121
  2. 2. Algebra

    Collect like terms: 2x + 3y + 8x + 3y

    Answer: 10x + 6y
  3. 3. Geometry

    Opposite = 8cm, adjacent = 10cm. Calculate the angle

    Answer: 38.7°
  4. 4. Ratio

    Simplify: 10:10:8

    Answer: 5:5:4
  5. 5. Statistics

    Calculate the mean of: 42, 42, 20, 13, 11, 45, 47

    Answer: 31.4

Friday 12 June 2026

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 798 + 220

    Answer: 798 + 220 = 1018
  2. 2. Algebra

    Collect like terms: 5x + 8y + 8x + 4y

    Answer: 13x + 12y
  3. 3. Geometry

    Find the area of a circle with radius 5cm

    Answer: 78.54cm²
  4. 4. Ratio

    Simplify: 16:8:16

    Answer: 2:1:2
  5. 5. Statistics

    Calculate the mean of: 30, 15, 12, 41, 41, 16, 12, 33

    Answer: 25