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Lintel Jul 30 - Aug 5 25 questions
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Monday 27 July 2026

Keystones #42 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 97 + ? = 177

    Answer: 80
  2. 2. Algebra

    Factorise fully: 8x² + 14x

    Answer: 2x(4x + 7)
  3. 3. Geometry

    Calculate the area of a circle with diameter 22cm

    Answer: 380.13cm²
  4. 4. Ratio

    Calculate 25.6% of 969

    Answer: 248.06
  5. 5. Statistics

    Calculate the mean of: 39, 11, 45, 24, 44, 5

    Answer: 28

Tuesday 28 July 2026

Keystones #43 · Five questions · Open this day only

  1. 1. Number

    Find the total of 282, 236, and 91

    Answer: 609
  2. 2. Algebra

    Simplify: 12x - 9x + 5y - y

    Answer: 3x + 4y
  3. 3. Geometry

    Opposite = 10cm, adjacent = 18cm. Calculate the angle

    Answer: 29.1°
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 8 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 4⁄7

Wednesday 29 July 2026

Keystones #44 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄2 + 3⁄6 + 2⁄3

    Answer: 5⁄3
  2. 2. Algebra

    Solve: 4x = 32

    Answer: x = 8
  3. 3. Geometry

    Find the distance between (-2, 0) and (6, 9)

    Answer: 12.04
  4. 4. Ratio

    Calculate 10.1% of 433

    Answer: 43.73
  5. 5. Statistics

    Find the range of: -7, -8, 45, -17, 8

    Answer: 62

Thursday 30 July 2026

Keystones #45 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 105. What are the numbers?

    Answer: 34, 35, and 36
  2. 2. Algebra

    Solve: 8x - 6 = 6x + -2

    Answer: x = 2
  3. 3. Geometry

    Calculate perimeter: two sides are 13cm and 8cm at right angles

    Answer: 36.3cm
  4. 4. Ratio

    Calculate 27.4% of 770

    Answer: 210.98
  5. 5. Statistics

    Find the range of: -20, 30, 4, -30, -3

    Answer: 60

Friday 31 July 2026

Keystones #46 · Five questions · Open this day only

  1. 1. Number

    Simplify: x8 × x4

    Answer: x12
  2. 2. Algebra

    Solve: x⁄4 = 9.75

    Answer: x = 39
  3. 3. Geometry

    Find c if a = 10cm and b = 21cm in a right triangle

    Answer: 23.3cm
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 8 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 4⁄7