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Bedrock Apr 30 - May 6 25 questions
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Monday 27 April 2026

Keystones #117 · Five questions · Open this day only

  1. 1. Number

    Calculate: 40 + 28

    Answer: 40 + 28 = 68
  2. 2. Algebra

    Factorise: 30x + 30

    Answer: 5(6x + 6)
  3. 3. Geometry

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

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

    Simplify the ratio 6:24

    Answer: 1:4
  5. 5. Statistics

    Find the mean of: 17, 11, 8

    Answer: 12

Tuesday 28 April 2026

Keystones #118 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄11 + 3⁄11

    Answer: 6⁄11
  2. 2. Algebra

    Find the next term: 29, 34, 39, 44, ...

    Answer: 49
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 30cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Simplify the ratio 12:6

    Answer: 2:1
  5. 5. Statistics

    Find the mean of: 20, 5, 18, 17

    Answer: 15

Wednesday 29 April 2026

Keystones #119 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra

    Simplify: 4x + 9x

    Answer: 13x
  3. 3. Geometry

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

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

    Calculate 10% of 49

    Answer: 4.9
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

Thursday 30 April 2026

Keystones #120 · Five questions · Open this day only

  1. 1. Number

    Calculate: 51 + 20

    Answer: 51 + 20 = 71
  2. 2. Algebra

    Simplify: 2x + 6x

    Answer: 8x
  3. 3. Geometry

    Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

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

    Simplify the ratio 40:20

    Answer: 2:1
  5. 5. Statistics

    Find the mean of: 19, 10, 20

    Answer: 16.333333333333

Friday 1 May 2026

Keystones #121 · Five questions · Open this day only

  1. 1. Number

    Calculate: -1 + 7

    Answer: 6
  2. 2. Algebra

    Find the next term: 21, 27, 33, 39, ...

    Answer: 45
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 8.5cm. Find the angle

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

    Simplify the ratio 8:4

    Answer: 2:1
  5. 5. Statistics

    Find the mean of: 18, 10, 15, 17, 6

    Answer: 13.2