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Lintel Jul 30 - Aug 5 25 questions
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Monday 3 August 2026

Keystones #49 · Five questions · Open this day only

  1. 1. Number

    Calculate: 992 + 767

    Answer: 1759
  2. 2. Algebra

    Factorise fully: 15x² + 9x

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

    Adjacent = 13cm, hypotenuse = 31cm. Find the angle

    Answer: 65.2°
  4. 4. Ratio

    Simplify: 4:4:6

    Answer: 2:2:3
  5. 5. Statistics

    A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄11

Tuesday 4 August 2026

Keystones #50 · Five questions · Open this day only

  1. 1. Number

    Calculate: 990 + 742

    Answer: 1732
  2. 2. Algebra

    Solve: x⁄8 = 1.25

    Answer: x = 10
  3. 3. Geometry

    A right triangle has hypotenuse 17cm and one side 8cm. Find its area

    Answer: 60cm²
  4. 4. Ratio

    Calculate 43.1% of 544

    Answer: 234.46
  5. 5. Statistics

    Find the range of: -30, 4, 48, -7, -16

    Answer: 78

Wednesday 5 August 2026

Keystones #51 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 88 + ? = 142

    Answer: 54
  2. 2. Algebra

    Solve: 2x = 12

    Answer: x = 6
  3. 3. Geometry

    Calculate perimeter: two sides are 11cm and 10cm at right angles

    Answer: 35.9cm
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 5 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄8

Thursday 6 August 2026

Keystones #52 · Five questions · Open this day only

  1. 1. Number

    Calculate: 994 + 765

    Answer: 1759
  2. 2. Algebra

    Solve: 2x = 22

    Answer: x = 11
  3. 3. Geometry

    Adjacent = 29cm, hypotenuse = 35cm. Find the angle

    Answer: 34°
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄11

Friday 7 August 2026

Keystones #53 · Five questions · Open this day only

  1. 1. Number

    Simplify: x3 × x3

    Answer: x6
  2. 2. Algebra

    Solve: x⁄6 = 3

    Answer: x = 18
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 13cm

    Answer: 15.81cm
  4. 4. Ratio

    Calculate 30.9% of 776

    Answer: 239.78
  5. 5. Statistics

    Find the range of: -25, 38, 19, 26, -11

    Answer: 63