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Cornerstone Jan 1 - 7 25 questions
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Monday 21 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 56.46 + 9.08

    Answer: 56.46 + 9.08 = 65.54
  2. 2. Algebra

    Solve: 2x = 16

    Answer: x = 8
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 5cm and 12cm

    Answer: 30cm
  4. 4. Ratio

    Simplify: 24:16:12

    Answer: 6:4:3
  5. 5. Statistics

    Calculate the range of: 47, 69, 70, 48, 52, 84

    Answer: 37

Tuesday 22 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 41 + 65

    Answer: 41 + 65 = 106
  2. 2. Algebra

    Solve: 9x = 108

    Answer: x = 12
  3. 3. Geometry

    Find the area of a right triangle with base 5cm and height 8cm

    Answer: 20cm²
  4. 4. Ratio

    Simplify: 15:12:6

    Answer: 5:4:2
  5. 5. Statistics

    Calculate the mean of: 8, 7, 17, 6, 21, 46, 16

    Answer: 17.3

Wednesday 23 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 119, 138, and 106

    Answer: 363
  2. 2. Algebra

    Find the next term: 12, 22, 32, 42, ...

    Answer: 52
  3. 3. Geometry

    Opposite = 20cm, adjacent = 12cm. Calculate the angle

    Answer: 59°
  4. 4. Ratio

    Find 24% of 243

    Answer: 58.32
  5. 5. Statistics

    Find the mean of: 4, 9, 16

    Answer: 9.6666666666667

Thursday 24 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 61 + ? = 142

    Answer: 81
  2. 2. Algebra

    Factorise: 6x + 6

    Answer: 2(3x + 3)
  3. 3. Geometry

    Opposite = 19cm, adjacent = 12cm. Calculate the angle

    Answer: 57.7°
  4. 4. Ratio

    Simplify the ratio 15:35

    Answer: 3:7
  5. 5. Statistics

    Calculate the mean of: 34, 33, 39, 23, 44, 24, 26

    Answer: 31.9

Friday 25 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 77 + 74

    Answer: 77 + 74 = 151
  2. 2. Algebra

    Collect like terms: 5x + 4y + 2x + 8y

    Answer: 7x + 12y
  3. 3. Geometry

    Opposite = 12cm, hypotenuse = 17cm. Find the angle

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

    Simplify the ratio 20:12

    Answer: 5:3
  5. 5. Statistics

    Find the range of: 18, 44, 17, 42, 18

    Answer: 27