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Cornerstone Jan 1 - 7 25 questions
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Monday 7 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5 + (-10)

    Answer: -5
  2. 2. Algebra

    Solve: x + 6 = 12

    Answer: x = 6
  3. 3. Geometry

    Find the area of a right triangle with base 5cm and height 9cm

    Answer: 22.5cm²
  4. 4. Ratio

    Simplify: 12:9:18

    Answer: 4:3:6
  5. 5. Statistics

    Calculate the mean of: 8, 19, 15, 46, 21, 19

    Answer: 21.3

Tuesday 8 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 59 + 39

    Answer: 89
  2. 2. Algebra

    Solve: x + 4 = 19

    Answer: x = 15
  3. 3. Geometry

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

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

    Simplify: 12:24:24

    Answer: 1:2:2
  5. 5. Statistics

    Calculate the range of: 75, 36, 40, 96, 83, 56

    Answer: 60

Wednesday 9 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    13000

    Answer: 1.3 × 104
  2. 2. Algebra

    Solve: 2x = 16

    Answer: x = 8
  3. 3. Geometry

    Opposite = 10cm, adjacent = 18cm. Calculate the angle

    Answer: 29.1°
  4. 4. Ratio

    Find 67% of 257

    Answer: 172.19
  5. 5. Statistics

    Find the mean of: 6, 4, 17, 8, 10

    Answer: 9

Thursday 10 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 27 + 36

    Answer: 1114
  2. 2. Algebra

    Solve: 2x = 8

    Answer: x = 4
  3. 3. Geometry

    Opposite = 11cm, hypotenuse = 22cm. Find the angle

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

    Find 48% of 426

    Answer: 204.48
  5. 5. Statistics

    Find the mean of: 4, 16, 17, 4, 11

    Answer: 10.4

Friday 11 June 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 71 + 89

    Answer: 71 + 89 = 160
  2. 2. Algebra

    Expand: 5(x + 8)

    Answer: 5x + 40
  3. 3. Geometry

    Calculate the area of a circle with diameter 14cm

    Answer: 153.94cm²
  4. 4. Ratio

    Find 46% of 151

    Answer: 69.46
  5. 5. Statistics

    Calculate the mean of: 5, 19, 50, 18, 8, 14, 28, 49

    Answer: 23.9