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Lintel Mar 5 - 11 25 questions
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Monday 2 March 2026

Keystones #61 · Five questions · Open this day only

  1. 1. Number

    What is ∛64?

    Answer: 4
  2. 2. Algebra

    Find the next term: 1, 3, 7, 13, ...

    Answer: 21
  3. 3. Geometry

    A circle has area 254.5cm². Find its radius (dp)

    Answer: 9cm
  4. 4. Ratio

    Calculate 18.5% of 934

    Answer: 172.79
  5. 5. Statistics

    Calculate the mean of: 30, 36, 11, 20, 12, 48

    Answer: 26.2

Tuesday 3 March 2026

Keystones #62 · Five questions · Open this day only

  1. 1. Number

    Calculate: 992 + 534

    Answer: 1526
  2. 2. Algebra

    Solve: 9x = 45

    Answer: x = 5
  3. 3. Geometry

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

    Answer: 45°
  4. 4. Ratio

    Calculate 16.1% of 842

    Answer: 135.56
  5. 5. Statistics

    A spinner has 3 red, 4 blue and 3 green sections. Probability of landing on red?

    Answer: 3⁄10

Wednesday 4 March 2026

Keystones #63 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 150. What are the numbers?

    Answer: 49, 50, and 51
  2. 2. Algebra

    Factorise: 5x² + 5x

    Answer: 5x(x + 1)
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 14cm

    Answer: 18.44cm
  4. 4. Ratio

    Simplify: 8:12:10

    Answer: 4:6:5
  5. 5. Statistics

    Calculate the mean of: 34, 19, 16, 5, 32, 18

    Answer: 20.7

Thursday 5 March 2026

Keystones #64 · Five questions · Open this day only

  1. 1. Number

    Simplify: 7√5 - 5√5

    Answer: 2√5
  2. 2. Algebra

    Solve: x⁄5 = 5.2

    Answer: x = 26
  3. 3. Geometry

    Find the distance between (-6, 0) and (9, 3)

    Answer: 15.3
  4. 4. Ratio

    Find 18% of 94

    Answer: 16.92
  5. 5. Statistics

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

    Answer: 1⁄3

Friday 6 March 2026

Keystones #65 · Five questions · Open this day only

  1. 1. Number

    Calculate: 997 + 578

    Answer: 1575
  2. 2. Algebra

    Solve: x⁄3 = 10

    Answer: x = 30
  3. 3. Geometry

    Opposite = 16cm, adjacent = 16cm. Calculate the angle

    Answer: 45°
  4. 4. Ratio

    Simplify: 6:8:6

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

    A spinner has 2 red, 3 blue and 5 green sections. Probability of landing on red?

    Answer: 1⁄5