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Lintel Jul 9 - 15 25 questions
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Monday 6 July 2026

Keystones #21 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 96 + ? = 116

    Answer: 20
  2. 2. Algebra

    What is the next term? 6, 24, 96, 384, ...

    Answer: 1536
  3. 3. Geometry

    Adjacent = 24cm, hypotenuse = 36cm. Find the angle

    Answer: 48.2°
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    Calculate the mean of: 49, 43, 46, 26, 38, 12, 28

    Answer: 34.6

Tuesday 7 July 2026

Keystones #22 · Five questions · Open this day only

  1. 1. Number

    Calculate: 993 + 706

    Answer: 1699
  2. 2. Algebra

    Solve: x⁄3 = 9.6666666666667

    Answer: x = 29
  3. 3. Geometry

    Opposite = 8cm, adjacent = 11cm. Calculate the angle

    Answer: 36°
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 3 red, 6 blue and 5 green sections. Probability of landing on red?

    Answer: 3⁄14

Wednesday 8 July 2026

Keystones #23 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄3 + 2⁄5 + 1⁄3

    Answer: 7⁄5
  2. 2. Algebra

    Solve: x⁄2 = 8.5

    Answer: x = 17
  3. 3. Geometry

    Opposite = 11cm, adjacent = 8cm. Calculate the angle

    Answer: 54°
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    Find the range of: 34, 34, -11, 19, 5

    Answer: 45

Thursday 9 July 2026

Keystones #24 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 64 + ? = 177

    Answer: 113
  2. 2. Algebra

    Solve: 6x = 42

    Answer: x = 7
  3. 3. Geometry

    Adjacent = 18cm, hypotenuse = 27cm. Find the angle

    Answer: 48.2°
  4. 4. Ratio

    Simplify the ratio 7m:700cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄11

Friday 10 July 2026

Keystones #25 · Five questions · Open this day only

  1. 1. Number

    Calculate: 655 + 254

    Answer: 655 + 254 = 909
  2. 2. Algebra

    Solve: 2x = 12

    Answer: x = 6
  3. 3. Geometry

    Opposite = 15cm, adjacent = 20cm. Calculate the angle

    Answer: 36.9°
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 8 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 2⁄3