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Cornerstone Jan 1 - 7 25 questions
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Monday 5 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 795 + 157

    Answer: 795 + 157 = 952
  2. 2. Algebra

    Simplify: 2x + 5x

    Answer: 7x
  3. 3. Geometry

    Opposite = 8cm, hypotenuse = 9.2cm. Find the angle

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

    Simplify: 12:12:10

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

    Calculate the mean of: 24, 14, 21, 41, 45, 16

    Answer: 26.8

Tuesday 6 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 88 + 38

    Answer: 88 + 38 = 126
  2. 2. Algebra

    Expand: 6(x + 3)

    Answer: 6x + 18
  3. 3. Geometry

    Calculate the area of a circle with diameter 24cm

    Answer: 452.39cm²
  4. 4. Ratio

    Find 31% of 454

    Answer: 140.74
  5. 5. Statistics

    Calculate the range of: 73, 49, 36, 52, 58, 46

    Answer: 37

Wednesday 7 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 170, 276, and 141

    Answer: 587
  2. 2. Algebra

    Solve: 6x = 90

    Answer: x = 15
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Find 41% of 375

    Answer: 153.75
  5. 5. Statistics

    Find the mean of: 5, 12, 2, 10, 19

    Answer: 9.6

Thursday 8 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 79 + ? = 123

    Answer: 44
  2. 2. Algebra

    What is the next term? 3, 12, 48, 192, ...

    Answer: 768
  3. 3. Geometry

    Find the area of a circle with radius 10cm

    Answer: 314.16cm²
  4. 4. Ratio

    Simplify: 8:10:6

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

    Find the range of: 34, 10, 17, 35, 35

    Answer: 25

Friday 9 May 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 74 + 56

    Answer: 74 + 56 = 130
  2. 2. Algebra

    Factorise: 18x + 9

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

    Calculate the distance between (9, 4) and (12, 8)

    Answer: 5
  4. 4. Ratio

    Simplify: 12:16:16

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

    Calculate the mean of: 25, 5, 14, 50, 33, 23, 22, 31

    Answer: 25.4