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Cornerstone Jan 1 - 7 25 questions
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Monday 19 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 53 × 52

    Answer: 55
  2. 2. Algebra

    What is the next term? 2, 6, 18, 54, ...

    Answer: 162
  3. 3. Geometry

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

    Answer: 49.9°
  4. 4. Ratio

    Find 15% of 489

    Answer: 73.35
  5. 5. Statistics

    Find the range of: 21, 16, 26, 33, 41

    Answer: 25

Tuesday 20 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 78 + ? = 171

    Answer: 93
  2. 2. Algebra

    Factorise: 2x² + 8x

    Answer: 2x(x + 4)
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 30cm. Find the angle

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

    Find 29% of 459

    Answer: 133.11
  5. 5. Statistics

    Calculate the mean of: 43, 42, 33, 20, 12, 32, 21

    Answer: 29

Wednesday 21 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 83 + 27

    Answer: 83 + 27 = 110
  2. 2. Algebra

    Find the next term: 17, 26, 35, 44, ...

    Answer: 53
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 15cm and 9cm

    Answer: 67.5cm²
  4. 4. Ratio

    Find 64% of 260

    Answer: 166.4
  5. 5. Statistics

    Find the range of: 31, 30, 21, 20, 20

    Answer: 11

Thursday 22 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 73 + ? = 158

    Answer: 85
  2. 2. Algebra

    Solve: x + 13 = 31

    Answer: x = 18
  3. 3. Geometry

    Opposite = 11cm, hypotenuse = 12.7cm. Find the angle

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

    Find 77% of 316

    Answer: 243.32
  5. 5. Statistics

    Find the range of: 25, 27, 24, 25, 12

    Answer: 15

Friday 23 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 87 + 22

    Answer: 87 + 22 = 109
  2. 2. Algebra

    Solve: 8x = 112

    Answer: x = 14
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 15cm

    Answer: 15.52cm
  4. 4. Ratio

    Find 82% of 328

    Answer: 268.96
  5. 5. Statistics

    Calculate the mean of: 26, 40, 19, 14, 33, 49, 44, 35

    Answer: 32.5