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Cornerstone Jan 1 - 7 25 questions
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Monday 16 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 722 + 144

    Answer: 722 + 144 = 866
  2. 2. Algebra

    Collect like terms: 2x + 5y + 3x + 4y

    Answer: 5x + 9y
  3. 3. Geometry

    Find the area of a circle with radius 8cm

    Answer: 201.06cm²
  4. 4. Ratio

    Simplify: 6:12:12

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

    Find the mean of: 8, 8, 3, 13, 6

    Answer: 7.6

Tuesday 17 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 43 + 27

    Answer: 43 + 27 = 70
  2. 2. Algebra

    Factorise: 12x + 28

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

    Opposite = 8cm, adjacent = 14cm. Calculate the angle

    Answer: 29.7°
  4. 4. Ratio

    Find 41% of 434

    Answer: 177.94
  5. 5. Statistics

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

    Answer: 811

Wednesday 18 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 63 + 87

    Answer: 63 + 87 = 150
  2. 2. Algebra

    Solve: x + 2 = 18

    Answer: x = 16
  3. 3. Geometry

    Opposite = 16cm, adjacent = 13cm. Calculate the angle

    Answer: 50.9°
  4. 4. Ratio

    Find 51% of 211

    Answer: 107.61
  5. 5. Statistics

    Calculate the mean of: 27, 33, 32, 45, 6, 14, 40

    Answer: 28.1

Thursday 19 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 42 + ? = 186

    Answer: 144
  2. 2. Algebra

    Solve: 2x = 10

    Answer: x = 5
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 18.4cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Find 70% of 81

    Answer: 56.7
  5. 5. Statistics

    What is the probability of rolling a 3 on a fair die?

    Answer: 16

Friday 20 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 74 + 62

    Answer: 74 + 62 = 136
  2. 2. Algebra

    Factorise: 4x² + 3x

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

    Opposite = 10cm, adjacent = 9cm. Calculate the angle

    Answer: 48°
  4. 4. Ratio

    Find 47% of 435

    Answer: 204.45
  5. 5. Statistics

    Calculate the range of: 37, 40, 97, 34, 80, 104

    Answer: 70