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Cornerstone Jan 1 - 7 25 questions
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Monday 6 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 845 + 271

    Answer: 845 + 271 = 1116
  2. 2. Algebra

    Solve: 10x - 6 = 8x + 14

    Answer: x = 10
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Simplify the ratio 40:25

    Answer: 8:5
  5. 5. Statistics

    Find the range of: 20, 23, 16, 33, 29

    Answer: 17

Tuesday 7 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 69 + 27

    Answer: 69 + 27 = 96
  2. 2. Algebra

    Simplify: 8x + 9x

    Answer: 17x
  3. 3. Geometry

    Opposite = 19cm, adjacent = 16cm. Calculate the angle

    Answer: 49.9°
  4. 4. Ratio

    Simplify the ratio 21:15

    Answer: 7:5
  5. 5. Statistics

    Calculate the mean of: 30, 31, 43, 21, 21, 24, 22, 44

    Answer: 29.5

Wednesday 8 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Simplify: 2x + 5x

    Answer: 7x
  3. 3. Geometry

    Calculate the area of a circle with diameter 19cm

    Answer: 283.53cm²
  4. 4. Ratio

    Simplify the ratio 20:8

    Answer: 5:2
  5. 5. Statistics

    Calculate the mean of: 38, 22, 25, 35, 16, 40, 27, 7

    Answer: 26.3

Thursday 9 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 539 + 643

    Answer: 539 + 643 = 1182
  2. 2. Algebra

    Solve: 6x = 60

    Answer: x = 10
  3. 3. Geometry

    Opposite = 14cm, hypotenuse = 28cm. Find the angle

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

    Calculate 25% of 80

    Answer: 20
  5. 5. Statistics

    Find the mean of: 5, 16, 10, 2, 18

    Answer: 10.2

Friday 10 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄7 + 2⁄6

    Answer: 10⁄21
  2. 2. Algebra

    Solve: 5x = 25

    Answer: x = 5
  3. 3. Geometry

    Opposite = 17cm, adjacent = 14cm. Calculate the angle

    Answer: 50.5°
  4. 4. Ratio

    Simplify the ratio 21:9

    Answer: 7:3
  5. 5. Statistics

    Find the mean of: 9, 15, 6, 7, 6

    Answer: 8.6