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Cornerstone Jan 1 - 7 25 questions
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Monday 26 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 68 + 84

    Answer: 68 + 84 = 152
  2. 2. Algebra

    Solve: 9x = 63

    Answer: x = 7
  3. 3. Geometry

    Find the area of a circle with radius 10cm

    Answer: 314.16cm²
  4. 4. Ratio

    Calculate 50% of 110

    Answer: 55
  5. 5. Statistics

    Find the mean of: 5, 16, 12

    Answer: 11

Tuesday 27 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    71000

    Answer: 7.1 × 104
  2. 2. Algebra

    Solve: x + 14 = 25

    Answer: x = 11
  3. 3. Geometry

    Opposite = 11cm, adjacent = 17cm. Calculate the angle

    Answer: 32.9°
  4. 4. Ratio

    Simplify the ratio 15:20

    Answer: 3:4
  5. 5. Statistics

    Calculate the mean of: 26, 37, 38, 49, 36, 33, 26, 13

    Answer: 32.3

Wednesday 28 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 67 + 14

    Answer: 3128
  2. 2. Algebra

    Solve: x + 5 = 12

    Answer: x = 7
  3. 3. Geometry

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

    Answer: 59°
  4. 4. Ratio

    Calculate 10% of 72

    Answer: 7.2
  5. 5. Statistics

    A bag has 8 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 815

Thursday 29 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 76 + 24

    Answer: 76 + 24 = 100
  2. 2. Algebra

    Solve: 6x - 5 = 4x + 1

    Answer: x = 3
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 21.2cm. Find the angle

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

    Calculate 50% of 79

    Answer: 39.5
  5. 5. Statistics

    Find the mean of: 15, 12, 20, 9, 17

    Answer: 14.6

Friday 30 September 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 62 × 65

    Answer: 67
  2. 2. Algebra

    Collect like terms: 2x + 4y + 3x + 8y

    Answer: 5x + 12y
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 15cm and 11cm

    Answer: 82.5cm²
  4. 4. Ratio

    Calculate 25% of 20

    Answer: 5
  5. 5. Statistics

    Find the range of: 33, 20, 17, 33, 44

    Answer: 27