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Cornerstone Jan 1 - 7 25 questions
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Monday 9 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 30 + 82

    Answer: 30 + 82 = 112
  2. 2. Algebra

    Solve: x + 7 = 27

    Answer: x = 20
  3. 3. Geometry

    Opposite = 7cm, hypotenuse = 9.9cm. Find the angle

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

    Calculate 25% of 181

    Answer: 45.25
  5. 5. Statistics

    Find the mean of: 9, 6, 12, 16, 15

    Answer: 11.6

Tuesday 10 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Multiply: 86 × 4

    Answer: 86 × 4 = 344
  2. 2. Algebra

    Find the next term: 22, 28, 34, 40, ...

    Answer: 46
  3. 3. Geometry

    Calculate the area of a circle with diameter 18cm

    Answer: 254.47cm²
  4. 4. Ratio

    Calculate 50% of 34

    Answer: 17
  5. 5. Statistics

    What is the probability of rolling a 2 on a fair die?

    Answer: 16

Wednesday 11 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 546 + 348

    Answer: 546 + 348 = 894
  2. 2. Algebra

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

    Answer: 11x + 12y
  3. 3. Geometry

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

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

    Simplify the ratio 15:9

    Answer: 5:3
  5. 5. Statistics

    Calculate the mean of: 37, 30, 50, 38, 28, 44, 9, 48

    Answer: 35.5

Thursday 12 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 38 + 61

    Answer: 38 + 61 = 99
  2. 2. Algebra

    Solve: 10x - 11 = 7x + 10

    Answer: x = 7
  3. 3. Geometry

    Calculate the area of a circle with diameter 19cm

    Answer: 283.53cm²
  4. 4. Ratio

    Simplify the ratio 10:35

    Answer: 2:7
  5. 5. Statistics

    Calculate the range of: 102, 102, 118, 117, 119, 43

    Answer: 76

Friday 13 January 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 545 + 643

    Answer: 545 + 643 = 1188
  2. 2. Algebra

    Solve: x + 6 = 17

    Answer: x = 11
  3. 3. Geometry

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

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

    Simplify the ratio 25:15

    Answer: 5:3
  5. 5. Statistics

    Find the mean of: 8, 5, 18, 19

    Answer: 12.5