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Cornerstone May 7 - 13 25 questions
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Monday 11 May 2026

Keystones #131 · Five questions · Open this day only

  1. 1. Number

    Calculate: 46 + 54

    Answer: 46 + 54 = 100
  2. 2. Algebra

    Factorise: 4x² + 4x

    Answer: 4x(x + 1)
  3. 3. Geometry

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

    Answer: 12cm
  4. 4. Ratio

    Simplify the ratio 30:20

    Answer: 3:2
  5. 5. Statistics

    Calculate the mean of: 8, 32, 21, 7, 20, 38, 12

    Answer: 19.7

Tuesday 12 May 2026

Keystones #132 · Five questions · Open this day only

  1. 1. Number

    Find the total of 135, 193, and 145

    Answer: 473
  2. 2. Algebra

    Solve: 9x = 63

    Answer: x = 7
  3. 3. Geometry

    Calculate the area of a circle with diameter 11cm

    Answer: 95.03cm²
  4. 4. Ratio

    Simplify the ratio 15:6

    Answer: 5:2
  5. 5. Statistics

    Calculate the mean of: 9, 41, 6, 34, 21, 32

    Answer: 23.8

Wednesday 13 May 2026

Keystones #133 · Five questions · Open this day only

  1. 1. Number

    Calculate: 54 + 38

    Answer: 54 + 38 = 92
  2. 2. Algebra

    Solve: x + 12 = 32

    Answer: x = 20
  3. 3. Geometry

    Find the distance between (5, 3) and (9, 7)

    Answer: 5.66
  4. 4. Ratio

    Simplify the ratio 4:10

    Answer: 2:5
  5. 5. Statistics

    Find the range of: 20, 29, 16, 22, 8

    Answer: 21

Thursday 14 May 2026

Keystones #134 · Five questions · Open this day only

  1. 1. Number

    Calculate: 73 + 47

    Answer: 73 + 47 = 120
  2. 2. Algebra

    Find the next term: 14, 21, 28, 35, ...

    Answer: 42
  3. 3. Geometry

    Find the area of a circle with radius 8cm

    Answer: 201.06cm²
  4. 4. Ratio

    Find 38% of 199

    Answer: 75.62
  5. 5. Statistics

    Calculate the range of: 43, 37, 51, 100, 92, 78

    Answer: 63

Friday 15 May 2026

Keystones #135 · Five questions · Open this day only

  1. 1. Number

    What is 2.2 + 2.66 + 0.64?

    Answer: 2.2 + 2.66 + 0.64 = 5.5
  2. 2. Algebra

    For y = x³ + 7, calculate y when x = 4

    Answer: y = 71
  3. 3. Geometry

    Calculate the area of a circle with diameter 16cm

    Answer: 201.06cm²
  4. 4. Ratio

    Find 68% of 267

    Answer: 181.56
  5. 5. Statistics

    Find the mean of: 9, 4, 17, 20, 15

    Answer: 13