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Cornerstone Jan 1 - 7 25 questions
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Monday 21 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: x + 4 = 9

    Answer: x = 5
  3. 3. Geometry

    Calculate perimeter: two sides are 9cm and 14cm at right angles

    Answer: 39.6cm
  4. 4. Ratio

    Simplify the ratio 35:10

    Answer: 7:2
  5. 5. Statistics

    Find the mean of: 16, 16, 10

    Answer: 14

Tuesday 22 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    7000000

    Answer: 7 × 106
  2. 2. Algebra

    Simplify: 9x + 3x

    Answer: 12x
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Simplify the ratio 32:12

    Answer: 8:3
  5. 5. Statistics

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

    Answer: 1⁄2

Wednesday 23 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 59 + 86

    Answer: 59 + 86 = 145
  2. 2. Algebra

    Solve: 5x = 50

    Answer: x = 10
  3. 3. Geometry

    Opposite = 18cm, adjacent = 9cm. Calculate the angle

    Answer: 63.4°
  4. 4. Ratio

    Simplify the ratio 8:16

    Answer: 1:2
  5. 5. Statistics

    Calculate the mean of: 31, 9, 45, 25, 29, 19, 47

    Answer: 29.3

Thursday 24 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 53 + 55

    Answer: 53 + 55 = 108
  2. 2. Algebra

    Collect like terms: 6x + 8y + 7x + 8y

    Answer: 13x + 16y
  3. 3. Geometry

    Calculate the distance between (7, 1) and (10, 5)

    Answer: 5
  4. 4. Ratio

    Simplify: 6:9:15

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

    Find the mean of: 14, 9, 10, 16

    Answer: 12.25

Friday 25 February 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 263, 261, and 145

    Answer: 669
  2. 2. Algebra

    Solve: x + 15 = 18

    Answer: x = 3
  3. 3. Geometry

    Opposite = 5cm, hypotenuse = 5.8cm. Find the angle

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

    Simplify: 15:18:12

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

    Calculate the range of: 61, 40, 120, 92, 118, 101

    Answer: 80