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Bedrock Apr 20 - 26 25 questions
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Monday 20 April 2026

Keystones #110 · Five questions · Open this day only

  1. 1. Number

    Simplify: 21⁄15

    Answer: 7⁄5
  2. 2. Algebra

    Find the next term: 9, 17, 25, 33, ...

    Answer: 41
  3. 3. Geometry

    What is the sum of interior angles in a triangle?

    Answer: 180°
  4. 4. Ratio

    Share 126 in the ratio 4:3

    Answer: 72 and 54
  5. 5. Statistics

    Find the median of: 11, 14, 10, 7, 14

    Answer: 11

Tuesday 21 April 2026

Keystones #111 · Five questions · Open this day only

  1. 1. Number

    Simplify: 20⁄20

    Answer: 4⁄4
  2. 2. Algebra

    Find the next term: 10, 16, 22, 28, ...

    Answer: 34
  3. 3. Geometry

    What is the sum of interior angles in a quadrilateral?

    Answer: 360°
  4. 4. Ratio

    Share 50 in the ratio 1:4

    Answer: 10 and 40
  5. 5. Statistics

    Find the median of: 16, 20, 5, 13, 7

    Answer: 13

Wednesday 22 April 2026

Keystones #112 · Five questions · Open this day only

  1. 1. Number

    Simplify: 15⁄15

    Answer: 3⁄3
  2. 2. Algebra

    Find the next term: 24, 31, 38, 45, ...

    Answer: 52
  3. 3. Geometry

    Calculate one exterior angle of a regular 8-sided polygon

    Answer: 45°
  4. 4. Ratio

    Share 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics

    Find the median of: 14, 17, 18, 19, 20

    Answer: 18

Thursday 23 April 2026

Keystones #113 · Five questions · Open this day only

  1. 1. Number

    Simplify: 21⁄21

    Answer: 7⁄7
  2. 2. Algebra

    Find the next term: 20, 22, 24, 26, ...

    Answer: 28
  3. 3. Geometry

    Calculate one exterior angle of a regular 6-sided polygon

    Answer: 60°
  4. 4. Ratio

    Share 90 in the ratio 1:2

    Answer: 30 and 60
  5. 5. Statistics

    Find the median of: 9, 16, 14, 15, 7

    Answer: 14

Friday 24 April 2026

Keystones #114 · Five questions · Open this day only

  1. 1. Number

    Simplify: 30⁄25

    Answer: 6⁄5
  2. 2. Algebra

    Find the next term: 13, 18, 23, 28, ...

    Answer: 33
  3. 3. Geometry

    Calculate one exterior angle of a regular 12-sided polygon

    Answer: 30°
  4. 4. Ratio

    Share 85 in the ratio 4:1

    Answer: 68 and 17
  5. 5. Statistics

    Find the median of: 5, 19, 11, 9, 12

    Answer: 11