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Lintel Aug 25 - 31 25 questions
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Monday 25 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.0057

    Answer: 5.7 × 10-3
  2. 2. Algebra

    Factorise: x² - 10x + 21

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

    Adjacent = 19cm, angle = 54°. Find opposite

    Answer: 26.2cm
  4. 4. Ratio

    Simplify: 6:12:6

    Answer: 1:2:1
  5. 5. Statistics

    Calculate the mean of: 38, 27, 18, 47, 38, 33, 34, 11

    Answer: 30.8

Tuesday 26 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    72000000

    Answer: 7.2 × 107
  2. 2. Algebra

    Factorise: x² - 13x + 42

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

    Hypotenuse = 33cm, angle = 39°. Find adjacent side

    Answer: 25.6cm
  4. 4. Ratio

    Simplify: 15:12:18

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

    Calculate the mean of: 21, 32, 17, 26, 23, 18

    Answer: 22.8

Wednesday 27 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00049

    Answer: 4.9 × 10-4
  2. 2. Algebra

    Factorise: x² + 2x - 48

    Answer: (x + 8)(x - 6)
  3. 3. Geometry

    Adjacent = 11cm, angle = 56°. Find opposite

    Answer: 16.3cm
  4. 4. Ratio

    Divide 70 in the ratio 3:1:1

    Answer: 42, 14 and 14
  5. 5. Statistics

    The mean of 5 numbers is 35. If 4 of them are 25, 32, 45, 43, what is the missing number?

    Answer: 30

Thursday 28 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00056

    Answer: 5.6 × 10-4
  2. 2. Algebra

    Factorise: x² + x - 12

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

    Adjacent = 20cm, angle = 54°. Find opposite

    Answer: 27.5cm
  4. 4. Ratio

    Simplify: 12:20:16

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

    The mean of 5 numbers is 38. If 4 of them are 26, 27, 42, 29, what is the missing number?

    Answer: 66

Friday 29 August 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    3600000

    Answer: 3.6 × 106
  2. 2. Algebra

    Factorise: x² - 8x + 12

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

    Hypotenuse = 40cm, angle = 29°. Find adjacent side

    Answer: 35cm
  4. 4. Ratio

    Divide 203 in the ratio 1:3:3

    Answer: 29, 87 and 87
  5. 5. Statistics

    Calculate the mean of: 19, 48, 27, 40, 33, 19, 9

    Answer: 27.9