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Cornerstone Jan 1 - 7 25 questions
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Monday 27 November 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 99 + ? = 137

    Answer: 38
  2. 2. Algebra

    For y = x³ + 3, calculate y when x = 2

    Answer: y = 11
  3. 3. Geometry

    Find the area of a circle with radius 4cm

    Answer: 50.27cm²
  4. 4. Ratio

    Calculate 50% of 156

    Answer: 78
  5. 5. Statistics

    Find the range of: 19, 18, 36, 35, 20

    Answer: 18

Tuesday 28 November 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 790 + 352

    Answer: 790 + 352 = 1142
  2. 2. Algebra

    Factorise: 5x² + 2x

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

    Opposite = 15cm, hypotenuse = 21.2cm. Find the angle

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

    Simplify the ratio 24:15

    Answer: 8:5
  5. 5. Statistics

    What is the probability of rolling a 6 on a fair die?

    Answer: 1⁄6

Wednesday 29 November 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 23 × 23

    Answer: 26
  2. 2. Algebra

    Solve: x + 8 = 23

    Answer: x = 15
  3. 3. Geometry

    Opposite = 20cm, adjacent = 18cm. Calculate the angle

    Answer: 48°
  4. 4. Ratio

    Calculate 10% of 160

    Answer: 16
  5. 5. Statistics

    Calculate the mean of: 21, 50, 31, 22, 7, 25

    Answer: 26

Thursday 30 November 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    800000

    Answer: 8 × 105
  2. 2. Algebra

    Solve: x + 6 = 10

    Answer: x = 4
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 6.9cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Calculate 25% of 96

    Answer: 24
  5. 5. Statistics

    Calculate the range of: 58, 48, 69, 72, 111, 45

    Answer: 66

Friday 1 December 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 57 + ? = 138

    Answer: 81
  2. 2. Algebra

    Find the next term: 12, 21, 30, 39, ...

    Answer: 48
  3. 3. Geometry

    Find the area of a circle with radius 7cm

    Answer: 153.94cm²
  4. 4. Ratio

    Calculate 25% of 140

    Answer: 35
  5. 5. Statistics

    Calculate the mean of: 32, 46, 19, 32, 20, 40, 48, 40

    Answer: 34.6