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Cornerstone Jan 1 - 7 25 questions
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Monday 19 December 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 80 + ? = 170

    Answer: 90
  2. 2. Algebra

    Expand: 6(6x + 8)

    Answer: 36x + 48
  3. 3. Geometry

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

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

    Simplify the ratio 25:15

    Answer: 5:3
  5. 5. Statistics

    Find the range of: 27, 6, 7, 21, 15

    Answer: 21

Tuesday 20 December 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 44 + 49

    Answer: 44 + 49 = 93
  2. 2. Algebra

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

    Answer: 14x + 8y
  3. 3. Geometry

    Calculate the area of a circle with diameter 19cm

    Answer: 283.53cm²
  4. 4. Ratio

    Calculate 50% of 46

    Answer: 23
  5. 5. Statistics

    Calculate the mean of: 20, 46, 9, 29, 9, 9, 42, 26

    Answer: 23.8

Wednesday 21 December 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 245 + 462

    Answer: 245 + 462 = 707
  2. 2. Algebra

    Solve: x + 5 = 14

    Answer: x = 9
  3. 3. Geometry

    Opposite = 7cm, hypotenuse = 14cm. Find the angle

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

    Simplify the ratio 40:35

    Answer: 8:7
  5. 5. Statistics

    Find the mean of: 5, 3, 20, 11

    Answer: 9.75

Thursday 22 December 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 21 + 22

    Answer: 21 + 22 = 43
  2. 2. Algebra

    Simplify: 7x + 8x

    Answer: 15x
  3. 3. Geometry

    Opposite = 14cm, adjacent = 12cm. Calculate the angle

    Answer: 49.4°
  4. 4. Ratio

    Simplify the ratio 8:24

    Answer: 1:3
  5. 5. Statistics

    Find the range of: 28, 12, 29, 41, 21

    Answer: 29

Friday 23 December 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 168, 180, and 139

    Answer: 487
  2. 2. Algebra

    Factorise: 6x² + 5x

    Answer: x(6x + 5)
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 18.4cm. Find the angle

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

    Simplify the ratio 25:15

    Answer: 5:3
  5. 5. Statistics

    Calculate the mean of: 28, 35, 34, 7, 7, 31, 45, 18

    Answer: 25.6