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Lintel May 26 - Jun 1 25 questions
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Monday 26 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.047

    Answer: 4.7 × 10-2
  2. 2. Algebra

    Factorise: x² + x - 12

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

    Adjacent = 22cm, angle = 57°. Find opposite

    Answer: 33.9cm
  4. 4. Ratio

    Divide 90 in the ratio 4:1:4

    Answer: 40, 10 and 40
  5. 5. Statistics

    Calculate the mean of: 37, 24, 23, 44, 26, 14, 48

    Answer: 30.9

Tuesday 27 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    85000000

    Answer: 8.5 × 107
  2. 2. Algebra

    Factorise: x² - 12x + 35

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

    Hypotenuse = 21cm, angle = 40°. Find adjacent side

    Answer: 16.cm
  4. 4. Ratio

    Express the first part of 5:6 as a fraction in simplest form

    Answer: 511
  5. 5. Statistics

    The mean of 5 numbers is 24. If 4 of them are 49, 24, 43, 32, what is the missing number?

    Answer: -28

Wednesday 28 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    200000

    Answer: 2 × 105
  2. 2. Algebra

    Factorise: x² - 13x + 42

    Answer: (x - 6)(x - 7)
  3. 3. Geometry

    Hypotenuse = 23cm, angle = 50°. Find adjacent side

    Answer: 14.8cm
  4. 4. Ratio

    Simplify: 20:20:12

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

    The mean of 4 numbers is 30. If 3 of them are 35, 15, 43, what is the missing number?

    Answer: 27

Thursday 29 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.0044

    Answer: 4.4 × 10-3
  2. 2. Algebra

    Factorise: x² + 5x - 24

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

    Adjacent = 22cm, angle = 30°. Find opposite

    Answer: 12.7cm
  4. 4. Ratio

    Simplify: 4:4:12

    Answer: 1:1:3
  5. 5. Statistics

    Calculate the mean of: 22, 29, 35, 36, 20, 21

    Answer: 27.2

Friday 30 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00047

    Answer: 4.7 × 10-4
  2. 2. Algebra

    Factorise: x² + 4x - 12

    Answer: (x + 6)(x - 2)
  3. 3. Geometry

    Hypotenuse = 30cm, angle = 59°. Find adjacent side

    Answer: 15.5cm
  4. 4. Ratio

    Simplify: 8:24:20

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

    Calculate the mean of: 14, 48, 27, 13, 28, 20, 42

    Answer: 27.4