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Cornerstone Jan 1 - 7 25 questions
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Monday 6 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 80 + 53

    Answer: 80 + 53 = 133
  2. 2. Algebra

    Solve: 6x = 60

    Answer: x = 10
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 8cm and 8cm

    Answer: 27.3cm
  4. 4. Ratio

    Simplify: 15:12:15

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

    Find the mean of: 15, 17, 4, 11, 7

    Answer: 10.8

Tuesday 7 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 84 + ? = 147

    Answer: 63
  2. 2. Algebra

    Solve: x + 7 = 11

    Answer: x = 4
  3. 3. Geometry

    Opposite = 9cm, hypotenuse = 10.4cm. Find the angle

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

    Simplify: 6:6:12

    Answer: 1:1:2
  5. 5. Statistics

    Calculate the mean of: 35, 5, 16, 35, 13, 27, 35

    Answer: 23.7

Wednesday 8 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 149, 164, and 73

    Answer: 386
  2. 2. Algebra

    Factorise: 42x + 30

    Answer: 6(7x + 5)
  3. 3. Geometry

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

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

    Find 37% of 173

    Answer: 64.01
  5. 5. Statistics

    Calculate the range of: 40, 96, 75, 77, 67, 94

    Answer: 56

Thursday 9 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 88 + 54

    Answer: 88 + 54 = 142
  2. 2. Algebra

    Solve: 5x = 50

    Answer: x = 10
  3. 3. Geometry

    Opposite = 15cm, adjacent = 19cm. Calculate the angle

    Answer: 38.3°
  4. 4. Ratio

    Simplify: 12:12:6

    Answer: 2:2:1
  5. 5. Statistics

    Find the mean of: 17, 16, 17, 16, 10

    Answer: 15.2

Friday 10 September 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 51 + 34

    Answer: 51 + 34 = 85
  2. 2. Algebra

    For y = x³ + 8, calculate y when x = 2

    Answer: y = 16
  3. 3. Geometry

    Opposite = 10cm, hypotenuse = 14.cm. Find the angle

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

    Find 75% of 101

    Answer: 75.75
  5. 5. Statistics

    Find the mean of: 10, 10, 5, 4, 4

    Answer: 6.6