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Cornerstone Jan 1 - 7 25 questions
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Monday 18 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 44 + 34

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

    Factorise: 25x + 15

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

    Find the area of a right triangle with base 12cm and height 5cm

    Answer: 30cm²
  4. 4. Ratio

    Simplify: 9:9:18

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

    What is the probability of rolling a 1 on a fair die?

    Answer: 16

Tuesday 19 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 85 + ? = 190

    Answer: 105
  2. 2. Algebra

    Solve: 9x = 90

    Answer: x = 10
  3. 3. Geometry

    Calculate the area of a circle with diameter 11cm

    Answer: 95.03cm²
  4. 4. Ratio

    Simplify: 12:12:8

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

    Calculate the mean of: 41, 49, 47, 5, 12, 33

    Answer: 31.2

Wednesday 20 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 25 + 70

    Answer: 25 + 70 = 95
  2. 2. Algebra

    Collect like terms: 7x + 4y + 7x + 8y

    Answer: 14x + 12y
  3. 3. Geometry

    Opposite = 12cm, hypotenuse = 13.9cm. Find the angle

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

    Simplify: 20:12:12

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

    Find the mean of: 2, 16, 15, 15

    Answer: 12

Thursday 21 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 30 + ? = 180

    Answer: 150
  2. 2. Algebra

    Solve: 9x + 8 = 6x + 26

    Answer: x = 6
  3. 3. Geometry

    Opposite = 8cm, adjacent = 19cm. Calculate the angle

    Answer: 22.8°
  4. 4. Ratio

    Find 56% of 341

    Answer: 190.96
  5. 5. Statistics

    Calculate the mean of: 15, 27, 19, 16, 50, 34, 33

    Answer: 27.7

Friday 22 April 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 23 + 65

    Answer: 23 + 65 = 88
  2. 2. Algebra

    Solve: x + 6 = 14

    Answer: x = 8
  3. 3. Geometry

    Find the area of a circle with radius 9cm

    Answer: 254.47cm²
  4. 4. Ratio

    Simplify: 16:20:16

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

    Calculate the range of: 35, 79, 91, 91, 40, 54

    Answer: 56