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Lintel Apr 21 - 27 25 questions
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Monday 21 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.087

    Answer: 8.7 × 10-2
  2. 2. Algebra

    Factorise: x² - 10x + 25

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

    Adjacent = 22cm, angle = 43°. Find opposite

    Answer: 20.5cm
  4. 4. Ratio

    Divide 105 in the ratio 1:4:2

    Answer: 15, 60 and 30
  5. 5. Statistics

    The mean of 5 numbers is 22. If 4 of them are 50, 16, 40, 30, what is the missing number?

    Answer: -26

Tuesday 22 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    4000000

    Answer: 4 × 106
  2. 2. Algebra

    Factorise: x² - 10x + 21

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

    Hypotenuse = 38cm, angle = 56°. Find adjacent side

    Answer: 21.2cm
  4. 4. Ratio

    Express the first part of 3:6 as a fraction in simplest form

    Answer: 13
  5. 5. Statistics

    The mean of 4 numbers is 33. If 3 of them are 45, 35, 34, what is the missing number?

    Answer: 18

Wednesday 23 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.021

    Answer: 2.1 × 10-2
  2. 2. Algebra

    Factorise: x² + x - 6

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

    Adjacent = 24cm, angle = 48°. Find opposite

    Answer: 26.7cm
  4. 4. Ratio

    Simplify: 6:8:12

    Answer: 3:4:6
  5. 5. Statistics

    Calculate the mean of: 34, 23, 33, 30, 6, 26, 47

    Answer: 28.4

Thursday 24 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.057

    Answer: 5.7 × 10-2
  2. 2. Algebra

    Factorise: x² + x - 2

    Answer: (x + 2)(x - 1)
  3. 3. Geometry

    Adjacent = 24cm, angle = 35°. Find opposite

    Answer: 16.8cm
  4. 4. Ratio

    Simplify the ratio 4m:400cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 4 numbers is 20. If 3 of them are 20, 45, 28, what is the missing number?

    Answer: -13

Friday 25 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    62000

    Answer: 6.2 × 104
  2. 2. Algebra

    Factorise: x² - 10x + 24

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

    Hypotenuse = 39cm, angle = 27°. Find adjacent side

    Answer: 34.7cm
  4. 4. Ratio

    In ratio 4:4:3, what fraction is the second part?

    Answer: 411
  5. 5. Statistics

    Calculate the mean of: 26, 6, 40, 49, 38, 38

    Answer: 32.8