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Cornerstone Jan 1 - 7 25 questions
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Monday 18 December 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    28000

    Answer: 2.8 × 104
  2. 2. Algebra

    Solve: x + 10 = 27

    Answer: x = 17
  3. 3. Geometry

    Calculate the area of a circle with diameter 16cm

    Answer: 201.06cm²
  4. 4. Ratio

    Simplify the ratio 12:10

    Answer: 6:5
  5. 5. Statistics

    Calculate the mean of: 22, 20, 30, 6, 21, 34

    Answer: 22.2

Tuesday 19 December 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄10 + 4⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Solve: 5x = 30

    Answer: x = 6
  3. 3. Geometry

    Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

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

    Simplify the ratio 10:35

    Answer: 2:7
  5. 5. Statistics

    Find the mean of: 10, 8, 14, 4, 17

    Answer: 10.6

Wednesday 20 December 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 492 + 909

    Answer: 492 + 909 = 1401
  2. 2. Algebra

    Collect like terms: 6x + 2y + 3x + 2y

    Answer: 9x + 4y
  3. 3. Geometry

    Opposite = 15cm, adjacent = 9cm. Calculate the angle

    Answer: 59°
  4. 4. Ratio

    Calculate 10% of 80

    Answer: 8
  5. 5. Statistics

    Calculate the range of: 50, 49, 21, 35, 29, 54

    Answer: 33

Thursday 21 December 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra

    Solve: x + 13 = 26

    Answer: x = 13
  3. 3. Geometry

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

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

    Simplify the ratio 6:15

    Answer: 2:5
  5. 5. Statistics

    Find the mean of: 8, 4, 5, 5, 8

    Answer: 6

Friday 22 December 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 223, 271, and 75

    Answer: 569
  2. 2. Algebra

    Find the next term: 12, 14, 16, 18, ...

    Answer: 20
  3. 3. Geometry

    Opposite = 13cm, adjacent = 12cm. Calculate the angle

    Answer: 47.3°
  4. 4. Ratio

    Simplify the ratio 10:4

    Answer: 5:2
  5. 5. Statistics

    Find the mean of: 17, 16, 13, 11, 20

    Answer: 15.4