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Cornerstone Jan 1 - 7 25 questions
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Monday 23 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 51 + ? = 191

    Answer: 140
  2. 2. Algebra

    Collect like terms: 5x + 5y + 4x + 3y

    Answer: 9x + 8y
  3. 3. Geometry

    Opposite = 17cm, adjacent = 11cm. Calculate the angle

    Answer: 57.1°
  4. 4. Ratio

    Simplify: 4:4:8

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

    Calculate the mean of: 41, 23, 7, 8, 13, 39, 31

    Answer: 23.1

Tuesday 24 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    6800000

    Answer: 6.8 × 106
  2. 2. Algebra

    Solve: 3x = 27

    Answer: x = 9
  3. 3. Geometry

    Opposite = 16cm, adjacent = 8cm. Calculate the angle

    Answer: 63.4°
  4. 4. Ratio

    Simplify the ratio 28:24

    Answer: 7:6
  5. 5. Statistics

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

    Answer: 12

Wednesday 25 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 73 + 34

    Answer: 73 + 34 = 107
  2. 2. Algebra

    Expand: 5(x + 6)

    Answer: 5x + 30
  3. 3. Geometry

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

    Answer: 5cm
  4. 4. Ratio

    Calculate 50% of 155

    Answer: 77.5
  5. 5. Statistics

    Calculate the mean of: 34, 38, 17, 10, 37, 44

    Answer: 30

Thursday 26 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 149, 176, and 58

    Answer: 383
  2. 2. Algebra

    Simplify: 6x + 3x

    Answer: 9x
  3. 3. Geometry

    Opposite = 12cm, adjacent = 9cm. Calculate the angle

    Answer: 53.1°
  4. 4. Ratio

    Simplify the ratio 15:21

    Answer: 5:7
  5. 5. Statistics

    Calculate the range of: 44, 37, 74, 49, 85, 95

    Answer: 58

Friday 27 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 66 + 20

    Answer: 66 + 20 = 86
  2. 2. Algebra

    Solve: 5x - 7 = 3x + 1

    Answer: x = 4
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 8.5cm. Find the angle

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

    Calculate 10% of 89

    Answer: 8.9
  5. 5. Statistics

    Find the range of: 16, 24, 46, 32, 33

    Answer: 30