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Cornerstone Jan 1 - 7 25 questions
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Monday 7 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 57 + 16

    Answer: 3742
  2. 2. Algebra

    Solve: 6x = 72

    Answer: x = 12
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Simplify the ratio 8:10

    Answer: 4:5
  5. 5. Statistics

    Calculate the mean of: 50, 14, 17, 32, 22, 20, 39, 48

    Answer: 30.3

Tuesday 8 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 151 + 437

    Answer: 151 + 437 = 588
  2. 2. Algebra

    Solve: 7x = 42

    Answer: x = 6
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 5cm, 12cm, 13cm

    Answer: 30cm
  4. 4. Ratio

    Calculate 50% of 66

    Answer: 33
  5. 5. Statistics

    Calculate the mean of: 20, 33, 15, 7, 22, 20, 40, 29

    Answer: 23.3

Wednesday 9 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 0 + 7

    Answer: 7
  2. 2. Algebra

    Factorise: 8x + 6

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

    Calculate the area of a circle with diameter 10cm

    Answer: 78.54cm²
  4. 4. Ratio

    Simplify the ratio 6:10

    Answer: 3:5
  5. 5. Statistics

    Find the mean of: 15, 5, 20, 9

    Answer: 12.25

Thursday 10 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 37 + 60

    Answer: 37 + 60 = 97
  2. 2. Algebra

    Find the next term: 18, 24, 30, 36, ...

    Answer: 42
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 15cm. Find the angle

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

    Calculate 25% of 115

    Answer: 28.75
  5. 5. Statistics

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

    Answer: 12

Friday 11 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 61 + ? = 167

    Answer: 106
  2. 2. Algebra

    Solve: 9x = 72

    Answer: x = 8
  3. 3. Geometry

    Calculate the area of a circle with diameter 24cm

    Answer: 452.39cm²
  4. 4. Ratio

    Simplify the ratio 6:21

    Answer: 2:7
  5. 5. Statistics

    Calculate the mean of: 45, 13, 44, 47, 47, 42

    Answer: 39.7