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Cornerstone Jan 1 - 7 25 questions
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Monday 17 October 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 50 + 35

    Answer: 50 + 35 = 85
  2. 2. Algebra

    Expand: 5(2x + 8)

    Answer: 10x + 40
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 3cm, 4cm, 5cm

    Answer: 12cm
  4. 4. Ratio

    Simplify the ratio 15:21

    Answer: 5:7
  5. 5. Statistics

    Calculate the mean of: 47, 27, 38, 29, 26, 45, 46, 43

    Answer: 37.6

Tuesday 18 October 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 42 + 53

    Answer: 42 + 53 = 95
  2. 2. Algebra

    Solve: 2x = 20

    Answer: x = 10
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 6cm, 8cm, 10cm

    Answer: 24cm
  4. 4. Ratio

    Calculate 10% of 112

    Answer: 11.2
  5. 5. Statistics

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

    Answer: 715

Wednesday 19 October 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 107, 195, and 63

    Answer: 365
  2. 2. Algebra

    Solve: x + 10 = 24

    Answer: x = 14
  3. 3. Geometry

    Opposite = 8cm, adjacent = 14cm. Calculate the angle

    Answer: 29.7°
  4. 4. Ratio

    Simplify the ratio 21:18

    Answer: 7:6
  5. 5. Statistics

    Find the mean of: 20, 4, 10, 15, 16

    Answer: 13

Thursday 20 October 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 60 + 80

    Answer: 60 + 80 = 140
  2. 2. Algebra

    Solve: x + 6 = 26

    Answer: x = 20
  3. 3. Geometry

    Find the area of a circle with radius 5cm

    Answer: 78.54cm²
  4. 4. Ratio

    Simplify the ratio 20:32

    Answer: 5:8
  5. 5. Statistics

    Calculate the mean of: 42, 42, 38, 5, 47, 18, 21, 50

    Answer: 32.9

Friday 21 October 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 246, 206, and 122

    Answer: 574
  2. 2. Algebra

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

    Answer: 6x + 11y
  3. 3. Geometry

    Calculate the area of a circle with diameter 8cm

    Answer: 50.27cm²
  4. 4. Ratio

    Calculate 50% of 89

    Answer: 44.5
  5. 5. Statistics

    What is the probability of rolling a 4 on a fair die?

    Answer: 16