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Lintel Jan 1 - 7 25 questions
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Monday 8 September 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 4⁄6 + 1⁄3 + 3⁄4

    Answer: 7⁄4
  2. 2. Algebra

    Solve: 2x = 22

    Answer: x = 11
  3. 3. Geometry

    A circle has area 314.2cm². Find its radius (dp)

    Answer: 10cm
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 8 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄11

Tuesday 9 September 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 8√3 - 5√3

    Answer: 3√3
  2. 2. Algebra

    Solve: x⁄2 = 6.5

    Answer: x = 13
  3. 3. Geometry

    Opposite = 19cm, adjacent = 14cm. Calculate the angle

    Answer: 53.6°
  4. 4. Ratio

    Calculate 36.4% of 864

    Answer: 314.5
  5. 5. Statistics

    Find the range of: -6, 29, -16, -17, 6

    Answer: 46

Wednesday 10 September 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8 + (-13) + (2)

    Answer: -3
  2. 2. Algebra

    Solve: x⁄3 = 5.6666666666667

    Answer: x = 17
  3. 3. Geometry

    Adjacent = 20cm, hypotenuse = 26cm. Find the angle

    Answer: 39.7°
  4. 4. Ratio

    Calculate 11.8% of 459

    Answer: 54.16
  5. 5. Statistics

    Find the range of: 38, 2, -21, -12, 16

    Answer: 59

Thursday 11 September 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 993 + 857

    Answer: 1850
  2. 2. Algebra

    Solve: 3x = 39

    Answer: x = 13
  3. 3. Geometry

    Calculate the distance between (3, 6) and (6, 10)

    Answer: 5
  4. 4. Ratio

    Calculate 30.2% of 320

    Answer: 96.64
  5. 5. Statistics

    A bag has 8 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄11

Friday 12 September 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 659 + 858

    Answer: 659 + 858 = 1517
  2. 2. Algebra

    What is the next term? 6, 18, 54, 162, ...

    Answer: 486
  3. 3. Geometry

    Adjacent = 25cm, hypotenuse = 37cm. Find the angle

    Answer: 47.5°
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄13