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Lintel Jan 1 - 7 25 questions
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Monday 3 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 335 + 920

    Answer: 335 + 920 = 1255
  2. 2. Algebra

    Factorise: 4x² + 9x

    Answer: x(4x + 9)
  3. 3. Geometry

    A circle has area 452.4cm². Find its radius (dp)

    Answer: 12cm
  4. 4. Ratio

    Simplify: 8:10:10

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

    A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 49

Tuesday 4 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 829 + 407

    Answer: 829 + 407 = 1236
  2. 2. Algebra

    Factorise: 3x² + 8x

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

    A right triangle has hypotenuse 10cm and one side 6cm. Find its area

    Answer: 24cm²
  4. 4. Ratio

    Calculate 20.5% of 248

    Answer: 50.84
  5. 5. Statistics

    Find the range of: -13, 32, -13, -19, 41

    Answer: 60

Wednesday 5 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 997 + 695

    Answer: 1692
  2. 2. Algebra

    Factorise fully: 35x² + 15x

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

    Opposite = 11cm, adjacent = 18cm. Calculate the angle

    Answer: 31.4°
  4. 4. Ratio

    Calculate 15.7% of 438

    Answer: 68.77
  5. 5. Statistics

    A bag has 6 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 23

Thursday 6 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 15 + 24

    Answer: 710
  2. 2. Algebra

    Factorise fully: 8x² + 20x

    Answer: 4x(2x + 5)
  3. 3. Geometry

    Find c if a = 11cm and b = 15cm in a right triangle

    Answer: 18.6cm
  4. 4. Ratio

    Calculate 13% of 798

    Answer: 103.74
  5. 5. Statistics

    A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 49

Friday 7 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 34 + 14 + 56

    Answer: 116
  2. 2. Algebra

    Factorise: 4x² + 7x

    Answer: x(4x + 7)
  3. 3. Geometry

    Calculate the area of a circle with diameter 17cm

    Answer: 226.98cm²
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

    Find the range of: -30, -22, 45, 27, -13

    Answer: 75