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Lintel Sep 7 - 13 25 questions
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Monday 7 September 2026

Keystones #250 · Five questions · Open this day only

  1. 1. Number

    Simplify: y2 × (y4)3 ÷ y3

    Answer: y11
  2. 2. Algebra

    Solve: 9x - 5 = 7x + 3

    Answer: x = 4
  3. 3. Geometry

    Find the distance between (-2, -2) and (11, 11)

    Answer: 18.38
  4. 4. Ratio

    A value of 394 increases by 9% each year for 3 years. Final value?

    Answer: 510.24
  5. 5. Statistics

    Find the median of: 78, 47, 29, 61, 25, 37, 22, 32, 63, 75

    Answer: 47

Tuesday 8 September 2026

Keystones #251 · Five questions · Open this day only

  1. 1. Number

    Simplify: y3 × (y4)4 ÷ y3

    Answer: y16
  2. 2. Algebra

    Solve: 9x - 4 = 6x + 26

    Answer: x = 10
  3. 3. Geometry

    Find the distance between (-8, 0) and (12, 10)

    Answer: 22.36
  4. 4. Ratio

    A value of 441 increases by 13% each year for 3 years. Final value?

    Answer: 636.32
  5. 5. Statistics

    Find the median of: 26, 42, 48, 69, 52, 30, 76, 74, 41

    Answer: 48

Wednesday 9 September 2026

Keystones #252 · Five questions · Open this day only

  1. 1. Number

    Simplify: (a2)2 × a3

    Answer: a7
  2. 2. Algebra

    Solve: 8x + 12 = 6x - 8

    Answer: x = 10
  3. 3. Geometry

    Calculate the distance between (1, 10) and (4, 14)

    Answer: 5
  4. 4. Ratio

    A value of 228 increases by 10% each year for 3 years. Final value?

    Answer: 303.47
  5. 5. Statistics

    Calculate the median of: 29, 11, 31, 18, 12, 24

    Answer: 21

Thursday 10 September 2026

Keystones #253 · Five questions · Open this day only

  1. 1. Number

    Simplify: y5 × (y4)4 ÷ y2

    Answer: y19
  2. 2. Algebra

    Solve: 7x + 8 = 3x - 9

    Answer: x = 4.3
  3. 3. Geometry

    Find the distance between (-6, -8) and (10, 7)

    Answer: 21.93
  4. 4. Ratio

    A value of 410 increases by 12% each year for 3 years. Final value?

    Answer: 576.02
  5. 5. Statistics

    Calculate the median of: 15, 26, 33, 25, 31, 31

    Answer: 28.5

Friday 11 September 2026

Keystones #254 · Five questions · Open this day only

  1. 1. Number

    Simplify: y5 × (y2)4 ÷ y1

    Answer: y12
  2. 2. Algebra

    Solve: 6x - 8 = 3x + 22

    Answer: x = 10
  3. 3. Geometry

    Calculate the distance between (2, 4) and (5, 8)

    Answer: 5
  4. 4. Ratio

    A value of 343 increases by 10% each year for 3 years. Final value?

    Answer: 456.53
  5. 5. Statistics

    Find the median of: 42, 78, 48, 48, 69, 73, 42, 64, 67

    Answer: 64