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Round invoice totals factorisation test, Dec 2024

Dec 2024

EstimateOur model or estimate. Treat it as an order of magnitude.

What this is

All four largest are multiples of $3,500. A whole-dollar price of $70 divides 9 of 15; so do $35, $90 (12 of 15 incl. smaller lines), etc.

The values

  • Gcd 94500 101500 98000 56000: 3,500
  • Multiples: 27, 29, 28, 16
  • Candidate whole dollar unit prices dividing 9 of 15 large invoices: 70
  • Candidate 70 as share of 161.64: 0.433

Where it comes from

Our calculation from other figures in the trainer’s notes:

Show the working
  1. 500174 12/27/24 $ 94,500.00.
  2. 504185 12/31/24 $ 101,500.00.
  3. 507202 12/31/24 $ 98,000.00.
  4. 500172 12/27/24 $ 56,000.00