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Lintel Jun 4 - 10 25 questions
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Monday 1 June 2026

Keystones #152 · Five questions · Open this day only

  1. 1. Number

    Calculate: 723 + 103

    Answer: 723 + 103 = 826
  2. 2. Algebra

    Solve: x⁄6 = 1.5

    Answer: x = 9
  3. 3. Geometry

    A circle has area 706.9cm². Find its radius (dp)

    Answer: 15cm
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

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

    Answer: 2⁄5

Tuesday 2 June 2026

Keystones #153 · Five questions · Open this day only

  1. 1. Number

    Calculate: 999 + 596

    Answer: 1595
  2. 2. Algebra

    Solve: x⁄7 = 3.8571428571429

    Answer: x = 27
  3. 3. Geometry

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

    Answer: 45°
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 5 red, 4 blue and 3 green sections. Probability of landing on red?

    Answer: 5⁄12

Wednesday 3 June 2026

Keystones #154 · Five questions · Open this day only

  1. 1. Number

    Find the total of 127, 161, and 58

    Answer: 346
  2. 2. Algebra

    What is the next term? 7, 21, 63, 189, ...

    Answer: 567
  3. 3. Geometry

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

    Answer: 9cm
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  5. 5. Statistics

    Calculate the mean of: 44, 44, 14, 27, 17, 27, 39

    Answer: 30.3

Thursday 4 June 2026

Keystones #155 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄6 + 3⁄4

    Answer: 5⁄4
  2. 2. Algebra

    Solve: 5x = 20

    Answer: x = 4
  3. 3. Geometry

    A circle has area 452.4cm². Find its radius (dp)

    Answer: 12cm
  4. 4. Ratio

    Find 26% of 409

    Answer: 106.34
  5. 5. Statistics

    A spinner has 4 red, 3 blue and 6 green sections. Probability of landing on red?

    Answer: 4⁄13

Friday 5 June 2026

Keystones #156 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 126. What are the numbers?

    Answer: 41, 42, and 43
  2. 2. Algebra

    Solve: x⁄4 = 3.25

    Answer: x = 13
  3. 3. Geometry

    Opposite = 19cm, adjacent = 19cm. Calculate the angle

    Answer: 45°
  4. 4. Ratio

    Simplify: 12:6:10

    Answer: 6:3:5
  5. 5. Statistics

    Calculate the mean of: 19, 5, 37, 36, 10, 37, 46, 15

    Answer: 25.6