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Cornerstone Jan 1 - 7 25 questions
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Monday 14 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 65 + 77

    Answer: 65 + 77 = 142
  2. 2. Algebra

    Simplify: 7x + 6x

    Answer: 13x
  3. 3. Geometry

    Calculate the area of a circle with diameter 19cm

    Answer: 283.53cm²
  4. 4. Ratio

    Calculate 10% of 177

    Answer: 17.7
  5. 5. Statistics

    Calculate the range of: 62, 67, 52, 37, 37, 40

    Answer: 30

Tuesday 15 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 84 + ? = 171

    Answer: 87
  2. 2. Algebra

    Solve: 3x = 9

    Answer: x = 3
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Calculate 25% of 120

    Answer: 30
  5. 5. Statistics

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

    Answer: 12

Wednesday 16 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 32 + 85

    Answer: 32 + 85 = 117
  2. 2. Algebra

    Factorise: 7x² + 7x

    Answer: 7x(x + 1)
  3. 3. Geometry

    Opposite = 13cm, adjacent = 15cm. Calculate the angle

    Answer: 40.9°
  4. 4. Ratio

    Calculate 25% of 66

    Answer: 16.5
  5. 5. Statistics

    Find the mean of: 16, 19, 10

    Answer: 15

Thursday 17 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    91000000

    Answer: 9.1 × 107
  2. 2. Algebra

    For y = x³, find y when x = 4

    Answer: y = 64
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Simplify the ratio 20:16

    Answer: 5:4
  5. 5. Statistics

    Calculate the mean of: 41, 49, 13, 39, 6, 34

    Answer: 30.3

Friday 18 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 35 + 37

    Answer: 3635
  2. 2. Algebra

    Solve: x + 13 = 31

    Answer: x = 18
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Calculate 25% of 47

    Answer: 11.75
  5. 5. Statistics

    Calculate the mean of: 25, 35, 40, 40, 12, 43

    Answer: 32.5