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Cornerstone Jan 1 - 7 25 questions
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Monday 27 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 38 + ? = 172

    Answer: 134
  2. 2. Algebra

    Collect like terms: 8x + 5y + 4x + 6y

    Answer: 12x + 11y
  3. 3. Geometry

    Find the area of a right triangle with base 7cm and height 11cm

    Answer: 38.5cm²
  4. 4. Ratio

    Calculate 25% of 31

    Answer: 7.75
  5. 5. Statistics

    Calculate the range of: 76, 88, 58, 53, 44, 37

    Answer: 51

Tuesday 28 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 84 + ? = 176

    Answer: 92
  2. 2. Algebra

    What is the next term? 6, 12, 24, 48, ...

    Answer: 96
  3. 3. Geometry

    Find the distance between (5, 1) and (9, 5)

    Answer: 5.66
  4. 4. Ratio

    Simplify the ratio 12:10

    Answer: 6:5
  5. 5. Statistics

    Calculate the mean of: 27, 42, 30, 16, 17, 5

    Answer: 22.8

Wednesday 29 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    600000

    Answer: 6 × 105
  2. 2. Algebra

    Factorise: 14x + 16

    Answer: 2(7x + 8)
  3. 3. Geometry

    Calculate the distance between (1, 2) and (4, 6)

    Answer: 5
  4. 4. Ratio

    Simplify the ratio 6:21

    Answer: 2:7
  5. 5. Statistics

    Find the range of: 6, 7, 8, 6, 16

    Answer: 10

Thursday 30 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 56 + 94

    Answer: 56 + 94 = 150
  2. 2. Algebra

    Solve: x + 8 = 21

    Answer: x = 13
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 12cm. Find the angle

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

    Calculate 50% of 108

    Answer: 54
  5. 5. Statistics

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

    Answer: 1⁄6

Friday 31 December 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 63 + ? = 114

    Answer: 51
  2. 2. Algebra

    Expand: 2(5x + 4)

    Answer: 10x + 8
  3. 3. Geometry

    Calculate the area of a circle with diameter 8cm

    Answer: 50.27cm²
  4. 4. Ratio

    Simplify the ratio 10:15

    Answer: 2:3
  5. 5. Statistics

    Calculate the mean of: 36, 29, 41, 40, 47, 27

    Answer: 36.7