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Lintel Jan 1 - 7 25 questions
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Monday 6 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 45 + ? = 189

    Answer: 144
  2. 2. Algebra

    Factorise fully: 35x² + 15x

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

    A circle has area 201.cm². Find its radius (dp)

    Answer: 8cm
  4. 4. Ratio

    Calculate 25.8% of 442

    Answer: 114.04
  5. 5. Statistics

    Find the range of: -16, -29, -13, 45, -2

    Answer: 74

Tuesday 7 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 135. What are the numbers?

    Answer: 44, 45, and 46
  2. 2. Algebra

    Solve: 8x = 88

    Answer: x = 11
  3. 3. Geometry

    Calculate the area of a circle with diameter 23cm

    Answer: 415.48cm²
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 3 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 311

Wednesday 8 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: y4 × y3 × y2

    Answer: y9
  2. 2. Algebra

    What is the next term? 6, 24, 96, 384, ...

    Answer: 1536
  3. 3. Geometry

    Opposite = 17cm, adjacent = 19cm. Calculate the angle

    Answer: 41.8°
  4. 4. Ratio

    Calculate 36.7% of 309

    Answer: 113.4
  5. 5. Statistics

    Calculate the mean of: 46, 38, 40, 33, 44, 31, 7, 45

    Answer: 35.5

Thursday 9 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 997 + 919

    Answer: 997 + 919 = 1916
  2. 2. Algebra

    Factorise fully: 20x² + 24x

    Answer: 4x(5x + 6)
  3. 3. Geometry

    Find c if a = 9cm and b = 21cm in a right triangle

    Answer: 22.8cm
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 6 red, 5 blue and 2 green sections. Probability of landing on red?

    Answer: 613

Friday 10 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 83 + ? = 187

    Answer: 104
  2. 2. Algebra

    Solve: x8 = 1

    Answer: x = 8
  3. 3. Geometry

    Opposite = 17cm, adjacent = 17cm. Calculate the angle

    Answer: 45°
  4. 4. Ratio

    Calculate 25.7% of 363

    Answer: 93.29
  5. 5. Statistics

    A spinner has 6 red, 5 blue and 6 green sections. Probability of landing on red?

    Answer: 617