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Cornerstone Jan 1 - 7 25 questions
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Monday 24 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 63 × 62

    Answer: 65
  2. 2. Algebra

    Solve: x + 10 = 24

    Answer: x = 14
  3. 3. Geometry

    Opposite = 20cm, adjacent = 19cm. Calculate the angle

    Answer: 46.5°
  4. 4. Ratio

    Simplify: 4:10:6

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

    Find the mean of: 18, 4, 20

    Answer: 14

Tuesday 25 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 347 + 996

    Answer: 347 + 996 = 1343
  2. 2. Algebra

    Solve: 6x = 84

    Answer: x = 14
  3. 3. Geometry

    Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

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

    Simplify: 12:12:6

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

    Calculate the range of: 42, 87, 52, 24, 91, 65

    Answer: 67

Wednesday 26 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 44 + 97

    Answer: 44 + 97 = 141
  2. 2. Algebra

    For y = x³ + 8, calculate y when x = 4

    Answer: y = 72
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 7cm and 6cm

    Answer: 22.2cm
  4. 4. Ratio

    Simplify: 8:8:12

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

    A bag has 6 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 611

Thursday 27 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 480 + 905

    Answer: 480 + 905 = 1385
  2. 2. Algebra

    Find the next term: 26, 35, 44, 53, ...

    Answer: 62
  3. 3. Geometry

    Find the area of a right triangle with base 9cm and height 4cm

    Answer: 18cm²
  4. 4. Ratio

    Simplify: 12:16:16

    Answer: 3:4:4
  5. 5. Statistics

    Find the mean of: 2, 11, 12, 12, 5

    Answer: 8.4

Friday 28 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is ∛8?

    Answer: 2
  2. 2. Algebra

    Simplify: 8x + 8x

    Answer: 16x
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Simplify: 12:9:15

    Answer: 4:3:5
  5. 5. Statistics

    Find the mean of: 14, 15, 16, 9, 14

    Answer: 13.6