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Lintel Mar 17 - 23 25 questions
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Monday 17 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.009

    Answer: 9 × 10-3
  2. 2. Algebra

    Factorise: x² + 2x - 3

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

    Hypotenuse = 23cm, angle = 46°. Find adjacent side

    Answer: 16cm
  4. 4. Ratio

    Simplify: 8:6:4

    Answer: 4:3:2
  5. 5. Statistics

    The mean of 4 numbers is 27. If 3 of them are 23, 22, 32, what is the missing number?

    Answer: 31

Tuesday 18 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.00028

    Answer: 2.8 × 10-4
  2. 2. Algebra

    Factorise: x² + 3x - 40

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

    Hypotenuse = 31cm, angle = 31°. Find adjacent side

    Answer: 26.6cm
  4. 4. Ratio

    Divide 65 in the ratio 2:1:2

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

    The mean of 5 numbers is 38. If 4 of them are 16, 25, 33, 16, what is the missing number?

    Answer: 100

Wednesday 19 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    740000

    Answer: 7.4 × 105
  2. 2. Algebra

    Factorise: x² - 8x + 12

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

    Adjacent = 20cm, angle = 52°. Find opposite

    Answer: 25.6cm
  4. 4. Ratio

    Simplify: 8:8:12

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

    Calculate the mean of: 24, 36, 42, 43, 38, 5

    Answer: 31.3

Thursday 20 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    0.035

    Answer: 3.5 × 10-2
  2. 2. Algebra

    Factorise: x² - 9x + 20

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

    Hypotenuse = 34cm, angle = 53°. Find adjacent side

    Answer: 20.5cm
  4. 4. Ratio

    Divide 189 in the ratio 4:2:3

    Answer: 84, 42 and 63
  5. 5. Statistics

    The mean of 6 numbers is 24. If 5 of them are 23, 22, 42, 17, 43, what is the missing number?

    Answer: -3

Friday 21 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    990000

    Answer: 9.9 × 105
  2. 2. Algebra

    Factorise: x² + x - 2

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

    Adjacent = 21cm, angle = 33°. Find opposite

    Answer: 13.6cm
  4. 4. Ratio

    Divide 168 in the ratio 4:2:1

    Answer: 96, 48 and 24
  5. 5. Statistics

    Calculate the mean of: 45, 28, 34, 44, 29, 47, 26

    Answer: 36.1