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Cornerstone Jan 1 - 7 25 questions
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Monday 20 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 62 + ? = 187

    Answer: 125
  2. 2. Algebra

    Simplify: 3x + 2x

    Answer: 5x
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 11cm and 10cm

    Answer: 35.9cm
  4. 4. Ratio

    Simplify: 20:12:20

    Answer: 5:3:5
  5. 5. Statistics

    Calculate the range of: 46, 27, 27, 34, 36, 59

    Answer: 32

Tuesday 21 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 81 + 53

    Answer: 81 + 53 = 134
  2. 2. Algebra

    What is the next term? 3, 6, 12, 24, ...

    Answer: 48
  3. 3. Geometry

    Opposite = 14cm, hypotenuse = 16.2cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Find 29% of 82

    Answer: 23.78
  5. 5. Statistics

    Find the mean of: 6, 16, 10, 9

    Answer: 10.25

Wednesday 22 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    8400000

    Answer: 8.4 × 106
  2. 2. Algebra

    Collect like terms: 6x + 4y + 8x + 7y

    Answer: 14x + 11y
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 12cm and 7cm

    Answer: 32.9cm
  4. 4. Ratio

    Find 60% of 207

    Answer: 124.2
  5. 5. Statistics

    Find the mean of: 3, 12, 17

    Answer: 10.666666666667

Thursday 23 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 55 + 25

    Answer: 55 + 25 = 80
  2. 2. Algebra

    Expand: 9(x + 2)

    Answer: 9x + 18
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 15cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify: 12:12:9

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

    Calculate the mean of: 36, 14, 39, 23, 8, 29, 18

    Answer: 23.9

Friday 24 January 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 68 + 18

    Answer: 78
  2. 2. Algebra

    Simplify: 6x + 6x

    Answer: 12x
  3. 3. Geometry

    Find the area of a circle with radius 5cm

    Answer: 78.54cm²
  4. 4. Ratio

    Simplify the ratio 25:20

    Answer: 5:4
  5. 5. Statistics

    Find the mean of: 13, 8, 15, 12

    Answer: 12