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Cornerstone Jan 1 - 7 25 questions
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Monday 14 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 73 + ? = 178

    Answer: 105
  2. 2. Algebra

    Simplify: 2x + 8x

    Answer: 10x
  3. 3. Geometry

    Calculate the area of a circle with diameter 14cm

    Answer: 153.94cm²
  4. 4. Ratio

    Simplify: 10:6:12

    Answer: 5:3:6
  5. 5. Statistics

    Calculate the mean of: 30, 37, 32, 6, 34, 26, 24, 45

    Answer: 29.3

Tuesday 15 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 39 + 29

    Answer: 59
  2. 2. Algebra

    Factorise: 6x² + 7x

    Answer: x(6x + 7)
  3. 3. Geometry

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

    Answer: 17cm
  4. 4. Ratio

    Find 16% of 226

    Answer: 36.16
  5. 5. Statistics

    Find the mean of: 18, 4, 3

    Answer: 8.3333333333333

Wednesday 16 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 89 + ? = 129

    Answer: 40
  2. 2. Algebra

    Solve: 3x = 36

    Answer: x = 12
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 6cm

    Answer: 12.53cm
  4. 4. Ratio

    Find 44% of 229

    Answer: 100.76
  5. 5. Statistics

    Find the mean of: 14, 3, 15, 9, 7

    Answer: 9.6

Thursday 17 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 81 + 86

    Answer: 81 + 86 = 167
  2. 2. Algebra

    Solve: x + 8 = 19

    Answer: x = 11
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

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

    Simplify: 12:10:8

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

    A bag has 7 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 711

Friday 18 November 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 73 × 74

    Answer: 77
  2. 2. Algebra

    Solve: x + 10 = 14

    Answer: x = 4
  3. 3. Geometry

    Find the area of a circle with radius 6cm

    Answer: 113.cm²
  4. 4. Ratio

    Find 66% of 459

    Answer: 302.94
  5. 5. Statistics

    Calculate the range of: 46, 50, 34, 73, 31, 48

    Answer: 42