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Cornerstone Jan 1 - 7 25 questions
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Monday 8 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 35 + 15

    Answer: 45
  2. 2. Algebra

    Factorise: 6x² + 3x

    Answer: 3x(2x + 1)
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Simplify: 12:20:20

    Answer: 3:5:5
  5. 5. Statistics

    Find the mean of: 11, 6, 14, 11, 10

    Answer: 10.4

Tuesday 9 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: x8 × x7

    Answer: x15
  2. 2. Algebra

    Factorise: 20x + 28

    Answer: 4(5x + 7)
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Find 26% of 181

    Answer: 47.06
  5. 5. Statistics

    Calculate the range of: 70, 42, 58, 45, 38, 38

    Answer: 32

Wednesday 10 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 26 + 17

    Answer: 1021
  2. 2. Algebra

    Solve: x + 11 = 28

    Answer: x = 17
  3. 3. Geometry

    Opposite = 13cm, adjacent = 17cm. Calculate the angle

    Answer: 37.4°
  4. 4. Ratio

    Simplify: 15:18:12

    Answer: 5:6:4
  5. 5. Statistics

    Calculate the mean of: 17, 17, 44, 39, 30, 17, 42

    Answer: 29.4

Thursday 11 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 81 + 74

    Answer: 81 + 74 = 155
  2. 2. Algebra

    Factorise: 9x² + 6x

    Answer: 3x(3x + 2)
  3. 3. Geometry

    Find the area of a circle with radius 4cm

    Answer: 50.27cm²
  4. 4. Ratio

    Simplify: 12:12:18

    Answer: 2:2:3
  5. 5. Statistics

    What is the probability of rolling a 6 on a fair die?

    Answer: 16

Friday 12 August 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 293, 210, and 111

    Answer: 614
  2. 2. Algebra

    Solve: 2x = 12

    Answer: x = 6
  3. 3. Geometry

    Opposite = 8cm, adjacent = 9cm. Calculate the angle

    Answer: 41.6°
  4. 4. Ratio

    Find 32% of 357

    Answer: 114.24
  5. 5. Statistics

    Find the range of: 32, 28, 20, 25, 19

    Answer: 13