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Lintel Jul 16 - 22 25 questions
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Monday 13 July 2026

Keystones #28 · Five questions · Open this day only

  1. 1. Number

    Simplify: y3 × y5 × y3

    Answer: y11
  2. 2. Algebra

    Factorise: 7x² + 5x

    Answer: x(7x + 5)
  3. 3. Geometry

    Adjacent = 20cm, hypotenuse = 35cm. Find the angle

    Answer: 55.2°
  4. 4. Ratio

    Calculate 13.8% of 635

    Answer: 87.63
  5. 5. Statistics

    A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 4⁄9

Tuesday 14 July 2026

Keystones #29 · Five questions · Open this day only

  1. 1. Number

    Calculate: 998 + 790

    Answer: 1788
  2. 2. Algebra

    Factorise: 4x² + 7x

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

    Adjacent = 17cm, hypotenuse = 30cm. Find the angle

    Answer: 55.5°
  4. 4. Ratio

    Find 75% of 267

    Answer: 200.25
  5. 5. Statistics

    Find the range of: 3, 27, 38, 6, -17

    Answer: 55

Wednesday 15 July 2026

Keystones #30 · Five questions · Open this day only

  1. 1. Number

    Calculate: 931 + 747

    Answer: 931 + 747 = 1678
  2. 2. Algebra

    Factorise fully: 12x² + 12x

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

    Opposite = 20cm, adjacent = 13cm. Calculate the angle

    Answer: 57°
  4. 4. Ratio

    Simplify: 10:6:4

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

    A bag has 6 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄5

Thursday 16 July 2026

Keystones #31 · Five questions · Open this day only

  1. 1. Number

    Calculate: 994 + 694

    Answer: 1688
  2. 2. Algebra

    Solve: x⁄8 = 1

    Answer: x = 8
  3. 3. Geometry

    Adjacent = 25cm, hypotenuse = 40cm. Find the angle

    Answer: 51.3°
  4. 4. Ratio

    Simplify: 12:12:24

    Answer: 1:1:2
  5. 5. Statistics

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

    Answer: 1⁄2

Friday 17 July 2026

Keystones #32 · Five questions · Open this day only

  1. 1. Number

    Calculate: 458 + 243

    Answer: 458 + 243 = 701
  2. 2. Algebra

    What is the next term? 5, 15, 45, 135, ...

    Answer: 405
  3. 3. Geometry

    Opposite = 17cm, adjacent = 11cm. Calculate the angle

    Answer: 57.1°
  4. 4. Ratio

    Simplify: 9:18:15

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

    Find the range of: -6, 20, -18, 14, 31

    Answer: 49