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Cornerstone Jan 1 - 7 25 questions
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Monday 28 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 87 + ? = 163

    Answer: 76
  2. 2. Algebra

    Factorise: 7x² + 2x

    Answer: x(7x + 2)
  3. 3. Geometry

    Opposite = 12cm, hypotenuse = 13.9cm. Find the angle

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

    Simplify: 15:12:18

    Answer: 5:4:6
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 12

Tuesday 1 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 36 + 35

    Answer: 1110
  2. 2. Algebra

    What is the next term? 8, 32, 128, 512, ...

    Answer: 2048
  3. 3. Geometry

    Calculate the area of a circle with diameter 17cm

    Answer: 226.98cm²
  4. 4. Ratio

    Simplify: 16:20:8

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

    Calculate the range of: 56, 50, 56, 61, 66, 96

    Answer: 46

Wednesday 2 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8.7 + 4.6

    Answer: 8.7 + 4.6 = 13.3
  2. 2. Algebra

    Solve: 9x = 54

    Answer: x = 6
  3. 3. Geometry

    Opposite = 14cm, hypotenuse = 28cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Find 28% of 229

    Answer: 64.12
  5. 5. Statistics

    Calculate the mean of: 18, 38, 31, 33, 45, 8, 34

    Answer: 29.6

Thursday 3 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 389 + 114

    Answer: 389 + 114 = 503
  2. 2. Algebra

    Solve: x + 11 = 22

    Answer: x = 11
  3. 3. Geometry

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

    Answer: 45°
  4. 4. Ratio

    Find 33% of 392

    Answer: 129.36
  5. 5. Statistics

    Find the mean of: 18, 6, 5

    Answer: 9.6666666666667

Friday 4 March 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 63 + ? = 106

    Answer: 43
  2. 2. Algebra

    Solve: x + 4 = 7

    Answer: x = 3
  3. 3. Geometry

    Opposite = 8cm, adjacent = 16cm. Calculate the angle

    Answer: 26.6°
  4. 4. Ratio

    Simplify the ratio 40:30

    Answer: 4:3
  5. 5. Statistics

    Calculate the range of: 59, 34, 37, 75, 76, 75

    Answer: 42