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Lintel Dec 8 - 14 25 questions
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Monday 8 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00093

    Answer: 9.3 × 10-4
  2. 2. Algebra

    Factorise: x² + 2x - 3

    Answer: (x + 3)(x - 1)
  3. 3. Geometry

    Adjacent = 14cm, angle = 60°. Find opposite

    Answer: 24.2cm
  4. 4. Ratio

    Simplify: 6:6:8

    Answer: 3:3:4
  5. 5. Statistics

    The mean of 4 numbers is 23. If 3 of them are 47, 22, 36, what is the missing number?

    Answer: -13

Tuesday 9 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    65000000

    Answer: 6.5 × 107
  2. 2. Algebra

    Factorise: x² - 10x + 24

    Answer: (x - 4)(x - 6)
  3. 3. Geometry

    Hypotenuse = 39cm, angle = 45°. Find adjacent side

    Answer: 27.6cm
  4. 4. Ratio

    Express the first part of 3:5 as a fraction in simplest form

    Answer: 38
  5. 5. Statistics

    Calculate the mean of: 18, 36, 37, 42, 39, 10

    Answer: 30.3

Wednesday 10 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    7900000

    Answer: 7.9 × 106
  2. 2. Algebra

    Factorise: x² - 11x + 30

    Answer: (x - 5)(x - 6)
  3. 3. Geometry

    Adjacent = 24cm, angle = 58°. Find opposite

    Answer: 38.4cm
  4. 4. Ratio

    Express the first part of 3:4 as a fraction in simplest form

    Answer: 37
  5. 5. Statistics

    Calculate the mean of: 8, 44, 19, 43, 48, 32

    Answer: 32.3

Thursday 11 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00091

    Answer: 9.1 × 10-4
  2. 2. Algebra

    Factorise: x² + 3x - 18

    Answer: (x + 6)(x - 3)
  3. 3. Geometry

    Hypotenuse = 32cm, angle = 56°. Find adjacent side

    Answer: 17.9cm
  4. 4. Ratio

    Divide 160 in the ratio 1:2:1

    Answer: 40, 80 and 40
  5. 5. Statistics

    The mean of 5 numbers is 34. If 4 of them are 47, 40, 48, 18, what is the missing number?

    Answer: 17

Friday 12 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    9400000

    Answer: 9.4 × 106
  2. 2. Algebra

    Factorise: x² + x - 12

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

    Adjacent = 29cm, angle = 33°. Find opposite

    Answer: 18.8cm
  4. 4. Ratio

    Divide 231 in the ratio 4:4:3

    Answer: 84, 84 and 63
  5. 5. Statistics

    The mean of 4 numbers is 23. If 3 of them are 17, 17, 37, what is the missing number?

    Answer: 21