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Cornerstone Jan 1 - 7 25 questions
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Monday 2 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 79.16 + 17.69

    Answer: 79.16 + 17.69 = 96.85
  2. 2. Algebra

    Solve: 5x + 9 = 3x + 19

    Answer: x = 5
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Simplify: 20:20:16

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

    Calculate the mean of: 46, 46, 47, 35, 17, 10, 43, 8

    Answer: 31.5

Tuesday 3 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 96 + 50

    Answer: 96 + 50 = 146
  2. 2. Algebra

    What is the next term? 6, 18, 54, 162, ...

    Answer: 486
  3. 3. Geometry

    Opposite = 16cm, adjacent = 13cm. Calculate the angle

    Answer: 50.9°
  4. 4. Ratio

    Simplify: 6:12:18

    Answer: 1:2:3
  5. 5. Statistics

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

    Answer: 12

Wednesday 4 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 56 + 93

    Answer: 56 + 93 = 149
  2. 2. Algebra

    Collect like terms: 4x + 6y + 6x + 8y

    Answer: 10x + 14y
  3. 3. Geometry

    Opposite = 17cm, adjacent = 8cm. Calculate the angle

    Answer: 64.8°
  4. 4. Ratio

    Simplify the ratio 12:28

    Answer: 3:7
  5. 5. Statistics

    Calculate the mean of: 14, 27, 35, 43, 7, 8

    Answer: 22.3

Thursday 5 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 529 + 327

    Answer: 529 + 327 = 856
  2. 2. Algebra

    Simplify: 2x + 2x

    Answer: 4x
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 6cm and 8cm

    Answer: 24cm
  4. 4. Ratio

    Simplify the ratio 28:20

    Answer: 7:5
  5. 5. Statistics

    Find the mean of: 8, 4, 9, 2

    Answer: 5.75

Friday 6 August 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 37 + 37

    Answer: 67
  2. 2. Algebra

    Solve: x + 4 = 21

    Answer: x = 17
  3. 3. Geometry

    Opposite = 8cm, adjacent = 12cm. Calculate the angle

    Answer: 33.7°
  4. 4. Ratio

    Simplify the ratio 15:35

    Answer: 3:7
  5. 5. Statistics

    Find the mean of: 6, 19, 13, 7

    Answer: 11.25