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Lintel Jun 25 - Jul 1 25 questions
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Monday 29 June 2026

Keystones #14 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 99. What are the numbers?

    Answer: 32, 33, and 34
  2. 2. Algebra

    Solve: x⁄8 = 3.625

    Answer: x = 29
  3. 3. Geometry

    Adjacent = 27cm, hypotenuse = 41cm. Find the angle

    Answer: 48.8°
  4. 4. Ratio

    Simplify: 12:9:12

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

    Find the range of: -22, -7, 13, 28, 5

    Answer: 50

Tuesday 30 June 2026

Keystones #15 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄3 + 1⁄3 + 1⁄2

    Answer: 7⁄6
  2. 2. Algebra

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

    Answer: 11
  3. 3. Geometry

    Opposite = 15cm, adjacent = 12cm. Calculate the angle

    Answer: 51.3°
  4. 4. Ratio

    Find 81% of 486

    Answer: 393.66
  5. 5. Statistics

    Find the range of: -26, -16, 44, 20, 17

    Answer: 70

Wednesday 1 July 2026

Keystones #16 · Five questions · Open this day only

  1. 1. Number

    Calculate: 34 + (-33)

    Answer: 1
  2. 2. Algebra

    Factorise: 9x² + 2x

    Answer: x(9x + 2)
  3. 3. Geometry

    A right triangle has hypotenuse 10cm and one side 6cm. Find its area

    Answer: 24cm²
  4. 4. Ratio

    Find 38% of 365

    Answer: 138.7
  5. 5. Statistics

    A spinner has 4 red, 5 blue and 2 green sections. Probability of landing on red?

    Answer: 4⁄11

Thursday 2 July 2026

Keystones #17 · Five questions · Open this day only

  1. 1. Number

    Calculate: 993 + 899

    Answer: 1892
  2. 2. Algebra

    Factorise: 3x² + 2x

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

    Opposite = 8cm, adjacent = 14cm. Calculate the angle

    Answer: 29.7°
  4. 4. Ratio

    Find 41% of 251

    Answer: 102.91
  5. 5. Statistics

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

    Answer: 6⁄17

Friday 3 July 2026

Keystones #18 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 82 + ? = 200

    Answer: 118
  2. 2. Algebra

    Expand: 8(3x - 2)

    Answer: 24x - 16
  3. 3. Geometry

    Adjacent = 23cm, hypotenuse = 28cm. Find the angle

    Answer: 34.8°
  4. 4. Ratio

    Find 28% of 336

    Answer: 94.08
  5. 5. Statistics

    Calculate the mean of: 18, 48, 13, 42, 14, 43

    Answer: 29.7