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Lintel Dec 1 - 7 25 questions
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Monday 1 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    280000

    Answer: 2.8 × 105
  2. 2. Algebra

    Factorise: x² - 9x + 14

    Answer: (x - 7)(x - 2)
  3. 3. Geometry

    Hypotenuse = 27cm, angle = 33°. Find adjacent side

    Answer: 22.6cm
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 5 numbers is 38. If 4 of them are 33, 48, 46, 22, what is the missing number?

    Answer: 41

Tuesday 2 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.0075

    Answer: 7.5 × 10-3
  2. 2. Algebra

    Factorise: x² - 10x + 25

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

    Adjacent = 16cm, angle = 56°. Find opposite

    Answer: 23.7cm
  4. 4. Ratio

    £240.00 is shared between A and B in the ratio 2:3. How much does A receive?

    Answer: £96.00
  5. 5. Statistics

    The mean of 6 numbers is 28. If 5 of them are 38, 50, 40, 15, 18, what is the missing number?

    Answer: 7

Wednesday 3 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    8800000

    Answer: 8.8 × 106
  2. 2. Algebra

    Factorise: x² + 3x - 4

    Answer: (x + 4)(x - 1)
  3. 3. Geometry

    Hypotenuse = 16cm, angle = 38°. Find adjacent side

    Answer: 12.6cm
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

    Calculate the mean of: 21, 41, 45, 21, 9, 20, 28

    Answer: 26.4

Thursday 4 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    9900000

    Answer: 9.9 × 106
  2. 2. Algebra

    Factorise: x² + 4x - 21

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

    Hypotenuse = 34cm, angle = 54°. Find adjacent side

    Answer: 20cm
  4. 4. Ratio

    Simplify: 9:6:15

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

    The mean of 4 numbers is 40. If 3 of them are 47, 19, 50, what is the missing number?

    Answer: 44

Friday 5 December 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00088

    Answer: 8.8 × 10-4
  2. 2. Algebra

    Factorise: x² - 6x + 8

    Answer: (x - 2)(x - 4)
  3. 3. Geometry

    Adjacent = 18cm, angle = 54°. Find opposite

    Answer: 24.8cm
  4. 4. Ratio

    Simplify: 20:24:8

    Answer: 5:6:2
  5. 5. Statistics

    Calculate the mean of: 36, 25, 31, 50, 35, 34

    Answer: 35.2