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Cornerstone Jan 1 - 7 25 questions
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Monday 4 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 97 + 44

    Answer: 97 + 44 = 141
  2. 2. Algebra

    Solve: 5x = 40

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 42cm²
  4. 4. Ratio

    Simplify the ratio 21:15

    Answer: 7:5
  5. 5. Statistics

    Find the mean of: 4, 15, 8

    Answer: 9

Tuesday 5 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 371 + 249

    Answer: 371 + 249 = 620
  2. 2. Algebra

    Solve: x + 2 = 18

    Answer: x = 16
  3. 3. Geometry

    Opposite = 8cm, hypotenuse = 11.3cm. Find the angle

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

    Simplify the ratio 32:12

    Answer: 8:3
  5. 5. Statistics

    Calculate the mean of: 21, 49, 27, 29, 31, 30

    Answer: 31.2

Wednesday 6 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    40000

    Answer: 4 × 104
  2. 2. Algebra

    Solve: x + 11 = 20

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio

    Simplify the ratio 12:16

    Answer: 3:4
  5. 5. Statistics

    Calculate the mean of: 46, 7, 40, 8, 43, 44, 23

    Answer: 30.1

Thursday 7 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 33 + ? = 109

    Answer: 76
  2. 2. Algebra

    Factorise: 9x² + 4x

    Answer: x(9x + 4)
  3. 3. Geometry

    Opposite = 8cm, hypotenuse = 11.3cm. Find the angle

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

    Simplify the ratio 10:35

    Answer: 2:7
  5. 5. Statistics

    Find the mean of: 10, 11, 3, 3

    Answer: 6.75

Friday 8 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 162, 155, and 117

    Answer: 434
  2. 2. Algebra

    Solve: 8x = 40

    Answer: x = 5
  3. 3. Geometry

    Opposite = 5cm, hypotenuse = 5.8cm. Find the angle

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

    Calculate 10% of 82

    Answer: 8.2
  5. 5. Statistics

    Find the mean of: 2, 14, 15, 16, 13

    Answer: 12