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Cornerstone Jan 1 - 7 25 questions
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Monday 7 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 111 + 611

    Answer: 711
  2. 2. Algebra

    Factorise: 6x² + 6x

    Answer: 6x(x + 1)
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 15cm. Find the angle

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

    Find 75% of 369

    Answer: 276.75
  5. 5. Statistics

    Calculate the mean of: 16, 8, 29, 8, 48, 34, 15

    Answer: 22.6

Tuesday 8 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 30 + 57

    Answer: 30 + 57 = 87
  2. 2. Algebra

    Collect like terms: 3x + 2y + 3x + 7y

    Answer: 6x + 9y
  3. 3. Geometry

    Find the area of a circle with radius 4cm

    Answer: 50.27cm²
  4. 4. Ratio

    Find 29% of 443

    Answer: 128.47
  5. 5. Statistics

    A bag has 6 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 613

Wednesday 9 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 46 + ? = 145

    Answer: 99
  2. 2. Algebra

    Simplify: 4x + 2x

    Answer: 6x
  3. 3. Geometry

    Opposite = 17cm, adjacent = 11cm. Calculate the angle

    Answer: 57.1°
  4. 4. Ratio

    Simplify: 16:24:16

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

    Find the mean of: 5, 7, 9, 13

    Answer: 8.5

Thursday 10 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 53 + ? = 172

    Answer: 119
  2. 2. Algebra

    Solve: 6x + 7 = 5x + 10

    Answer: x = 3
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 8.5cm. Find the angle

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

    Simplify: 9:18:9

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

    Find the range of: 31, 32, 23, 13, 19

    Answer: 19

Friday 11 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 95 + 45

    Answer: 95 + 45 = 140
  2. 2. Algebra

    Solve: 6x = 84

    Answer: x = 14
  3. 3. Geometry

    Opposite = 10cm, adjacent = 19cm. Calculate the angle

    Answer: 27.8°
  4. 4. Ratio

    Simplify: 10:12:10

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

    A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 513