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Lintel Jan 20 - 26 25 questions
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Monday 20 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00058

    Answer: 5.8 × 10-4
  2. 2. Algebra

    Factorise: x² + 2x - 3

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

    Adjacent = 21cm, angle = 36°. Find opposite

    Answer: 15.3cm
  4. 4. Ratio

    Divide 65 in the ratio 1:2:2

    Answer: 13, 26 and 26
  5. 5. Statistics

    The mean of 5 numbers is 25. If 4 of them are 41, 47, 19, 41, what is the missing number?

    Answer: -23

Tuesday 21 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    5300000

    Answer: 5.3 × 106
  2. 2. Algebra

    Factorise: x² - 9x + 20

    Answer: (x - 4)(x - 5)
  3. 3. Geometry

    Hypotenuse = 37cm, angle = 62°. Find adjacent side

    Answer: 17.4cm
  4. 4. Ratio

    Simplify: 8:12:24

    Answer: 2:3:6
  5. 5. Statistics

    Calculate the mean of: 11, 26, 22, 49, 38, 32

    Answer: 29.7

Wednesday 22 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.0099

    Answer: 9.9 × 10-3
  2. 2. Algebra

    Factorise: x² - 10x + 24

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

    Adjacent = 12cm, angle = 56°. Find opposite

    Answer: 17.8cm
  4. 4. Ratio

    Divide 100 in the ratio 3:3:4

    Answer: 30, 30 and 40
  5. 5. Statistics

    Calculate the mean of: 29, 16, 19, 22, 36, 46

    Answer: 28

Thursday 23 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    8700000

    Answer: 8.7 × 106
  2. 2. Algebra

    Factorise: x² + x - 56

    Answer: (x + 8)(x - 7)
  3. 3. Geometry

    Hypotenuse = 38cm, angle = 42°. Find adjacent side

    Answer: 28.2cm
  4. 4. Ratio

    Simplify: 10:10:6

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

    The mean of 6 numbers is 37. If 5 of them are 32, 49, 20, 32, 35, what is the missing number?

    Answer: 54

Friday 24 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    53000

    Answer: 5.3 × 104
  2. 2. Algebra

    Factorise: x² - 8x + 15

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

    Hypotenuse = 33cm, angle = 59°. Find adjacent side

    Answer: 17cm
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    Calculate the mean of: 23, 21, 8, 31, 40, 25

    Answer: 24.7