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Cornerstone Jan 1 - 7 25 questions
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Monday 20 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 70 + 70

    Answer: 70 + 70 = 140
  2. 2. Algebra

    Solve: x + 15 = 30

    Answer: x = 15
  3. 3. Geometry

    Opposite = 7cm, hypotenuse = 14cm. Find the angle

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

    Simplify the ratio 40:25

    Answer: 8:5
  5. 5. Statistics

    Calculate the mean of: 24, 47, 42, 17, 17, 30

    Answer: 29.5

Tuesday 21 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 212 + 284

    Answer: 212 + 284 = 496
  2. 2. Algebra

    For y = x³ + 10, calculate y when x = 4

    Answer: y = 74
  3. 3. Geometry

    Opposite = 11cm, adjacent = 9cm. Calculate the angle

    Answer: 50.7°
  4. 4. Ratio

    Calculate 25% of 73

    Answer: 18.25
  5. 5. Statistics

    Find the mean of: 10, 12, 14

    Answer: 12

Wednesday 22 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: -3 + 0

    Answer: -3
  2. 2. Algebra

    Solve: 3x = 33

    Answer: x = 11
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Calculate 10% of 139

    Answer: 13.9
  5. 5. Statistics

    Find the range of: 31, 25, 20, 29, 29

    Answer: 11

Thursday 23 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 69 + ? = 110

    Answer: 41
  2. 2. Algebra

    For y = x³, find y when x = 5

    Answer: y = 125
  3. 3. Geometry

    Calculate the hypotenuse when a = 7cm and b = 10cm

    Answer: 12.21cm
  4. 4. Ratio

    Calculate 25% of 119

    Answer: 29.75
  5. 5. Statistics

    Calculate the mean of: 10, 37, 15, 5, 9, 32, 30, 38

    Answer: 22

Friday 24 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    32000

    Answer: 3.2 × 104
  2. 2. Algebra

    Expand: 5(x + 3)

    Answer: 5x + 15
  3. 3. Geometry

    Calculate the distance between (10, 1) and (13, 5)

    Answer: 5
  4. 4. Ratio

    Find 46% of 151

    Answer: 69.46
  5. 5. Statistics

    Find the range of: 32, 32, 12, 28, 8

    Answer: 24