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Cornerstone Jan 1 - 7 25 questions
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Monday 28 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Simplify: 33 × 35

    Answer: 38
  2. 2. Algebra

    For y = x³, find y when x = 2

    Answer: y = 8
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 6.9cm. Find the angle

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

    Simplify the ratio 35:40

    Answer: 7:8
  5. 5. Statistics

    Calculate the mean of: 25, 38, 9, 30, 11, 44, 7, 36

    Answer: 25

Tuesday 29 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 38 + ? = 175

    Answer: 137
  2. 2. Algebra

    Solve: 9x = 108

    Answer: x = 12
  3. 3. Geometry

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

    Answer: 63.4°
  4. 4. Ratio

    Simplify the ratio 35:30

    Answer: 7:6
  5. 5. Statistics

    Find the range of: 9, 11, 36, 30, 36

    Answer: 27

Wednesday 30 April 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 40 + ? = 176

    Answer: 136
  2. 2. Algebra

    Solve: 9x = 135

    Answer: x = 15
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Calculate 50% of 188

    Answer: 94
  5. 5. Statistics

    Find the mean of: 8, 20, 3, 11

    Answer: 10.5

Thursday 1 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 95 + 57

    Answer: 95 + 57 = 152
  2. 2. Algebra

    Factorise: 42x + 18

    Answer: 6(7x + 3)
  3. 3. Geometry

    Opposite = 18cm, adjacent = 20cm. Calculate the angle

    Answer: 42°
  4. 4. Ratio

    Simplify the ratio 40:25

    Answer: 8:5
  5. 5. Statistics

    Find the mean of: 20, 11, 20, 3, 13

    Answer: 13.4

Friday 2 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 843 + 111

    Answer: 843 + 111 = 954
  2. 2. Algebra

    Find the next term: 18, 25, 32, 39, ...

    Answer: 46
  3. 3. Geometry

    Opposite = 8cm, hypotenuse = 11.3cm. Find the angle

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

    Simplify the ratio 35:10

    Answer: 7:2
  5. 5. Statistics

    Find the mean of: 5, 8, 4, 10, 8

    Answer: 7