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Cornerstone Jan 1 - 7 25 questions
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Monday 1 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is 3.5 + 1.92 + 0.46?

    Answer: 3.5 + 1.92 + 0.46 = 5.88
  2. 2. Algebra

    Factorise: 24x + 15

    Answer: 3(8x + 5)
  3. 3. Geometry

    Opposite = 9cm, hypotenuse = 18cm. Find the angle

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

    Simplify the ratio 4:8

    Answer: 1:2
  5. 5. Statistics

    Find the mean of: 9, 11, 9, 16

    Answer: 11.25

Tuesday 2 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 98 + 22

    Answer: 98 + 22 = 120
  2. 2. Algebra

    Expand: 7(x + 5)

    Answer: 7x + 35
  3. 3. Geometry

    Opposite = 11cm, adjacent = 16cm. Calculate the angle

    Answer: 34.5°
  4. 4. Ratio

    Calculate 50% of 52

    Answer: 26
  5. 5. Statistics

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

    Answer: 1⁄2

Wednesday 3 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄8 + 2⁄6

    Answer: 11⁄24
  2. 2. Algebra

    Solve: 3x = 12

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Simplify the ratio 20:16

    Answer: 5:4
  5. 5. Statistics

    Calculate the range of: 80, 99, 46, 82, 69, 29

    Answer: 70

Thursday 4 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 91 + ? = 162

    Answer: 71
  2. 2. Algebra

    Factorise: 7x² + 4x

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

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Simplify: 12:8:20

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

    Find the mean of: 12, 15, 6, 13

    Answer: 11.5

Friday 5 November 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 44 + 34

    Answer: 44 + 34 = 78
  2. 2. Algebra

    Expand: 9(x + 7)

    Answer: 9x + 63
  3. 3. Geometry

    Opposite = 16cm, adjacent = 20cm. Calculate the angle

    Answer: 38.7°
  4. 4. Ratio

    Simplify: 6:12:12

    Answer: 1:2:2
  5. 5. Statistics

    Calculate the mean of: 43, 17, 11, 39, 17, 11

    Answer: 23