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Lintel Jul 28 - Aug 3 25 questions
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Monday 28 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    540000

    Answer: 5.4 × 105
  2. 2. Algebra

    Factorise: x² + 3x - 40

    Answer: (x + 8)(x - 5)
  3. 3. Geometry

    Adjacent = 21cm, angle = 41°. Find opposite

    Answer: 18.3cm
  4. 4. Ratio

    Divide 120 in the ratio 2:1:2

    Answer: 48, 24 and 48
  5. 5. Statistics

    The mean of 6 numbers is 27. If 5 of them are 22, 37, 23, 36, 37, what is the missing number?

    Answer: 7

Tuesday 29 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00038

    Answer: 3.8 × 10-4
  2. 2. Algebra

    Factorise: x² - 6x + 9

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

    Hypotenuse = 36cm, angle = 38°. Find adjacent side

    Answer: 28.4cm
  4. 4. Ratio

    Simplify: 16:20:16

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

    Calculate the mean of: 18, 36, 44, 27, 8, 36, 17, 49

    Answer: 29.4

Wednesday 30 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00098

    Answer: 9.8 × 10-4
  2. 2. Algebra

    Factorise: x² - 10x + 25

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

    Adjacent = 26cm, angle = 35°. Find opposite

    Answer: 18.2cm
  4. 4. Ratio

    Express the first part of 2:5 as a fraction in simplest form

    Answer: 27
  5. 5. Statistics

    Calculate the mean of: 45, 30, 31, 39, 43, 38, 40, 34

    Answer: 37.5

Thursday 31 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    75000

    Answer: 7.5 × 104
  2. 2. Algebra

    Factorise: x² + 4x - 21

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

    Hypotenuse = 21cm, angle = 60°. Find adjacent side

    Answer: 10.5cm
  4. 4. Ratio

    Simplify: 6:15:6

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

    The mean of 4 numbers is 30. If 3 of them are 44, 27, 36, what is the missing number?

    Answer: 13

Friday 1 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.058

    Answer: 5.8 × 10-2
  2. 2. Algebra

    Factorise: x² - 5x + 6

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

    Hypotenuse = 34cm, angle = 40°. Find adjacent side

    Answer: 26cm
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    Calculate the mean of: 28, 16, 29, 26, 34, 6

    Answer: 23.2