The Dishonest Dealer: False Weights

04 Try it yourself Interactive

What he charged for against what he gave

Choose what the dealer invoices and what he actually hands over. The console finds the error, divides by the delivered amount, and shows explicitly what dividing by the claimed amount would have given instead. The two numbers are always close, which is precisely why the wrong one is such a reliable trap.

Charges 1000 g, gives 900 g

11.11% gain, not 10%

The delivered amount must be less than the claimed amount — that is what makes him dishonest. Equal amounts would be an honest dealer and no gain.

Press Next to work through it one step at a time.

Charged–

Given–

Error–

Gain %–

step 0 / 0