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Cornerstone Jan 1 - 7 25 questions
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Monday 25 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 93 + ? = 101

    Answer: 8
  2. 2. Algebra

    What is the next term? 7, 21, 63, 189, ...

    Answer: 567
  3. 3. Geometry

    Calculate the area of a circle with diameter 23cm

    Answer: 415.48cm²
  4. 4. Ratio

    Simplify the ratio 12:8

    Answer: 3:2
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 12

Tuesday 26 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 57 + 89

    Answer: 57 + 89 = 146
  2. 2. Algebra

    Solve: 4x = 52

    Answer: x = 13
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Simplify the ratio 14:12

    Answer: 7:6
  5. 5. Statistics

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

    Answer: 16

Wednesday 27 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 226, 205, and 83

    Answer: 514
  2. 2. Algebra

    Solve: x + 4 = 14

    Answer: x = 10
  3. 3. Geometry

    Opposite = 13cm, adjacent = 8cm. Calculate the angle

    Answer: 58.4°
  4. 4. Ratio

    Simplify the ratio 35:10

    Answer: 7:2
  5. 5. Statistics

    Calculate the mean of: 22, 6, 15, 17, 12, 7, 29, 39

    Answer: 18.4

Thursday 28 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 138, 206, and 144

    Answer: 488
  2. 2. Algebra

    Find the next term: 23, 28, 33, 38, ...

    Answer: 43
  3. 3. Geometry

    Calculate the distance between (8, 2) and (11, 6)

    Answer: 5
  4. 4. Ratio

    Simplify the ratio 6:9

    Answer: 2:3
  5. 5. Statistics

    A bag has 5 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 58

Friday 29 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    20000

    Answer: 2 × 104
  2. 2. Algebra

    What is the next term? 3, 6, 12, 24, ...

    Answer: 48
  3. 3. Geometry

    Opposite = 9cm, hypotenuse = 12.7cm. Find the angle

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

    Calculate 10% of 39

    Answer: 3.9
  5. 5. Statistics

    Find the mean of: 15, 15, 10

    Answer: 13.333333333333