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Lintel Jan 1 - 7 25 questions
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Monday 29 September 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 96. What are the numbers?

    Answer: 31, 32, and 33
  2. 2. Algebra

    Solve: x⁄4 = 4.5

    Answer: x = 18
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 8cm

    Answer: 12.81cm
  4. 4. Ratio

    Calculate 24.1% of 868

    Answer: 209.19
  5. 5. Statistics

    A bag has 4 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 4⁄11

Tuesday 30 September 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 129. What are the numbers?

    Answer: 42, 43, and 44
  2. 2. Algebra

    Factorise fully: 6x² + 18x

    Answer: 3x(2x + 6)
  3. 3. Geometry

    Adjacent = 21cm, hypotenuse = 31cm. Find the angle

    Answer: 47.4°
  4. 4. Ratio

    Calculate 17.3% of 268

    Answer: 46.36
  5. 5. Statistics

    A bag has 3 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2

Wednesday 1 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 995 + 588

    Answer: 1583
  2. 2. Algebra

    Find the next term: 1, 4, 10, 19, ...

    Answer: 31
  3. 3. Geometry

    Adjacent = 12cm, hypotenuse = 30cm. Find the angle

    Answer: 66.4°
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    Find the range of: -19, 17, -27, 42, 37

    Answer: 69

Thursday 2 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 535 + 230

    Answer: 535 + 230 = 765
  2. 2. Algebra

    Find the next term: 1, 2, 4, 7, ...

    Answer: 11
  3. 3. Geometry

    Opposite = 11cm, adjacent = 12cm. Calculate the angle

    Answer: 42.5°
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    Find the range of: 16, 45, -18, 7, 27

    Answer: 63

Friday 3 October 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 996 + 734

    Answer: 1730
  2. 2. Algebra

    Solve: 2x = 10

    Answer: x = 5
  3. 3. Geometry

    Adjacent = 12cm, hypotenuse = 30cm. Find the angle

    Answer: 66.4°
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 3 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2