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Cornerstone Jan 1 - 7 25 questions
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Monday 22 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: x4 × x4

    Answer: x8
  2. 2. Algebra

    Expand: 2(x + 7)

    Answer: 2x + 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 14cm

    Answer: 16.12cm
  4. 4. Ratio

    Simplify the ratio 15:35

    Answer: 3:7
  5. 5. Statistics

    Calculate the mean of: 30, 18, 18, 30, 40, 26, 31

    Answer: 27.6

Tuesday 23 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7.1 + 1.3

    Answer: 7.1 + 1.3 = 8.4
  2. 2. Algebra

    Solve: 3x = 30

    Answer: x = 10
  3. 3. Geometry

    Find the area of a circle with radius 9cm

    Answer: 254.47cm²
  4. 4. Ratio

    Simplify the ratio 32:20

    Answer: 8:5
  5. 5. Statistics

    What is the probability of rolling a 3 on a fair die?

    Answer: 16

Wednesday 24 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 40 + 82

    Answer: 40 + 82 = 122
  2. 2. Algebra

    Solve: 3x = 39

    Answer: x = 13
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 30cm. Find the angle

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

    Find 54% of 326

    Answer: 176.04
  5. 5. Statistics

    Calculate the mean of: 36, 24, 7, 7, 42, 21, 43, 14

    Answer: 24.3

Thursday 25 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 62 + ? = 115

    Answer: 53
  2. 2. Algebra

    Solve: x + 2 = 13

    Answer: x = 11
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 9cm and 10cm

    Answer: 32.5cm
  4. 4. Ratio

    Simplify: 6:8:10

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

    Find the range of: 14, 14, 15, 35, 43

    Answer: 29

Friday 26 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 85 + 49

    Answer: 85 + 49 = 134
  2. 2. Algebra

    Solve: x + 12 = 16

    Answer: x = 4
  3. 3. Geometry

    Opposite = 9cm, hypotenuse = 18cm. Find the angle

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

    Simplify: 12:8:8

    Answer: 3:2:2
  5. 5. Statistics

    Find the mean of: 18, 16, 8

    Answer: 14