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Cornerstone Mar 26 - Apr 1 25 questions
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Monday 23 March 2026

Keystones #82 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 88 + ? = 101

    Answer: 13
  2. 2. Algebra

    Solve: 7x = 105

    Answer: x = 15
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Simplify the ratio 24:18

    Answer: 4:3
  5. 5. Statistics

    Find the mean of: 3, 13, 16, 12

    Answer: 11

Tuesday 24 March 2026

Keystones #83 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 40 + ? = 176

    Answer: 136
  2. 2. Algebra

    What is the next term? 7, 14, 28, 56, ...

    Answer: 112
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify: 12:24:16

    Answer: 3:6:4
  5. 5. Statistics

    Calculate the mean of: 43, 13, 40, 15, 49, 38

    Answer: 33

Wednesday 25 March 2026

Keystones #84 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄10 + 3⁄10

    Answer: 1⁄2
  2. 2. Algebra

    Expand: 5(x + 2)

    Answer: 5x + 10
  3. 3. Geometry

    Opposite = 15cm, adjacent = 14cm. Calculate the angle

    Answer: 47°
  4. 4. Ratio

    Simplify: 16:12:24

    Answer: 4:3:6
  5. 5. Statistics

    Find the range of: 23, 34, 18, 44, 38

    Answer: 26

Thursday 26 March 2026

Keystones #85 · Five questions · Open this day only

  1. 1. Number

    Calculate: 914 + 643

    Answer: 914 + 643 = 1557
  2. 2. Algebra

    For y = x³, find y when x = 5

    Answer: y = 125
  3. 3. Geometry

    Opposite = 10cm, hypotenuse = 11.5cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify: 12:24:16

    Answer: 3:6:4
  5. 5. Statistics

    Find the mean of: 7, 14, 13, 3, 17

    Answer: 10.8

Friday 27 March 2026

Keystones #86 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9.4 + 8.3

    Answer: 9.4 + 8.3 = 17.7
  2. 2. Algebra

    What is the next term? 2, 4, 8, 16, ...

    Answer: 32
  3. 3. Geometry

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

    Answer: 45°
  4. 4. Ratio

    Find 56% of 173

    Answer: 96.88
  5. 5. Statistics

    Calculate the mean of: 50, 49, 31, 14, 22, 23

    Answer: 31.5