Know the rules. Name the number.

Keep payments once a customer has handed them over.

Deep Space Nine · The Nagus

Return a payment when the customer requests it.

Deep Space Nine · Prophet Motive

Zek’s temporary revision, not the standard rule with this number.

Pay only as much as an acquisition requires.

Deep Space Nine · The Maquis, Part II

Put business opportunities ahead of family loyalties.

Deep Space Nine · The Nagus

Enterprise’s Acquisition uses “profit” rather than “opportunity” for this same numbered rule. The possessions saying is unnumbered.

Keep your ears open.

Deep Space Nine · In the Hands of the Prophets

Overlooked fine print can create serious risks.

Lower Decks · Parth Ferengi’s Heart Place

Originally a reference-book rule; subsequently quoted on screen in Lower Decks.

Do not let a commercial opportunity pass you by.

Warchild (novel)

An opportunity combined with instinct can produce earnings.

Deep Space Nine · The Storyteller

The desire to acquire never comes to an end.

Deep Space Nine · Prophet Motive

The desire to acquire has ceased to exist.

Deep Space Nine · Prophet Motive

Zek’s temporary revision, not the standard rule with this number.

Worthwhile work deserves a financial return.

The Making of Star Trek: Deep Space Nine, p. 27; The Ferengi Rules of Acquisition, p. 9

An agreement must be honored.

Deep Space Nine · Melora

The on-screen form is the binding-deal maxim. The later “better deal” addendum belongs to book material, not the quoted Melora dialogue.

Contracts are binding, provided both parties are Ferengi.

Deep Space Nine · Body Parts

A Ferengi who earns nothing fails the Ferengi ideal.

Deep Space Nine · Heart of Stone

A customer has no assurance of satisfaction.

The Ferengi Rules of Acquisition (reference book)

Choose earnings over a friendship.

Deep Space Nine · Rules of Acquisition

Give friendship priority over earnings.

Deep Space Nine · Prophet Motive

Zek’s temporary revision, not the standard rule with this number.

A perceptive trader notices profit-making possibilities.

Deep Space Nine · Rules of Acquisition

Family remains after latinum has lost its luster.

Deep Space Nine · Prophet Motive

Zek’s temporary revision, not the standard rule with this number.

Health matters above everything except wealth.

Enterprise · Acquisition

Financial wealth cannot substitute for personal dignity.

Deep Space Nine · Prophet Motive

Zek’s temporary revision, not the standard rule with this number.

An honest trader can be exceptionally dangerous.

The Ferengi Rules of Acquisition (reference book)

Avoid jokes at the expense of a Ferengi’s mother.

Deep Space Nine · The Siege

The additional instruction about insulting something else is a book extension, not the short on-screen form.

Flattering your employer can help you advance.

Deep Space Nine · Rules of Acquisition

War creates opportunities for profitable trade.

Deep Space Nine · Destiny

Peace also creates opportunities for profitable trade.

Deep Space Nine · Destiny

Intimacy may involve your lobes, never your latinum.

The Ferengi Rules of Acquisition (reference book)

Earning money is a sufficient reward in itself.

The Ferengi Rules of Acquisition (reference book)

Distinguish sound judgment from a fortunate outcome.

The Ferengi Rules of Acquisition (reference book)

Keep growing your business or face extinction.

Enterprise · Acquisition

The same maxim is #45 in Enterprise’s Acquisition and #95 in Voyager’s False Profits. Both are recorded; neither is used for a single-number quiz question.

Be suspicious of someone dressed more expensively than yourself.

Deep Space Nine · Rivals

An especially friendly smile can conceal especially dangerous intentions.

Deep Space Nine · Rules of Acquisition

Take something rather than request it.

The Ferengi Rules of Acquisition (reference book)

Treat valuable customers as scarce and precious.

Deep Space Nine · Armageddon Game

Nothing can replace achieving success.

The Ferengi Rules of Acquisition (reference book)

Advice offered without a fee may still cost you.

Deep Space Nine · Rules of Acquisition

Make sure your deceptions agree with one another.

The Ferengi Rules of Acquisition (reference book)

Encourage two other parties to fight each other.

Balance of Power (The Next Generation novel), p. 87

A different rule #60 from the consistency-of-lies book entry.

Greater commercial risks can bring greater financial rewards.

Deep Space Nine · Rules of Acquisition

Victory or defeat can both be followed by Hupyrian snuff.

The Ferengi Rules of Acquisition (reference book)

The specific consolation is Hupyrian beetle snuff; the earlier generic clue omitted that detail.

A Ferengi bears no blame for another species’ foolishness.

Balance of Power (The Next Generation novel), p. 179

Information can be converted into earnings.

Voyager · Inside Man

Home offers affection; the wider universe offers latinum.

Deep Space Nine · Civil Defense

Occasional peace can leave your enemies bewildered.

Deep Space Nine · The Homecoming

Be wary of the Vulcan appetite for information.

The Ferengi Rules of Acquisition (reference book)

Charge more as the quality of the merchandise decreases.

The Ferengi Rules of Acquisition (reference book)

Keep your plans hidden from competitors.

The Ferengi Rules of Acquisition (reference book)

Devote yourself to increasing your earnings.

The Ferengi Rules of Acquisition (reference book)

Judge an employer’s value by the pay they provide.

Lower Decks · Old Friends, New Planets

The rule excludes women from financial affairs.

Deep Space Nine · Ferengi Love Songs

Keep growing your business or face extinction.

Voyager · False Profits

The same maxim is #45 in Enterprise’s Acquisition and #95 in Voyager’s False Profits. Both are recorded; neither is used for a single-number quiz question.

There is always a desire to acquire still more.

The Ferengi Rules of Acquisition (reference book)

Anyone can be bought if the payment is right.

Deep Space Nine · In the Pale Moonlight

Putting faith in others creates the greatest liability.

The Ferengi Rules of Acquisition (reference book)

Living things perish, whereas latinum endures.

Deep Space Nine · The Jem’Hadar

The spoken rule starts with a warning about sleep, then stops.

Deep Space Nine · Rules of Acquisition

The dialogue is interrupted. No ending is supplied here or tested in the quiz.

Belief can shift enormous quantities of merchandise.

The Ferengi Rules of Acquisition (reference book)

Having no money offers no honor.

The Ferengi Rules of Acquisition, p. 51

The reference list also records this wording before its later novel appearance.

Pride adds no value to an empty moneybag.

Deep Space Nine · Rivals

Exploit debtors as readily as you exploit relatives.

Deep Space Nine · Past Tense, Part I

Do not sleep with your employer’s sister.

Deep Space Nine · Playing God

Sleeping with your employer is always encouraged.

The Ferengi Rules of Acquisition (reference book)

Even a friendship can be put up for sale.

The Ferengi Rules of Acquisition (reference book)

Latinum has an appeal that needs no eyesight.

The Ferengi Rules of Acquisition (reference book)

Wives perform service; brothers receive the inheritance.

Deep Space Nine · Necessary Evil

Paying the full retail price is foolish.

The Ferengi Rules of Acquisition (reference book)

Charity is acceptable when you receive the proceeds.

The Ferengi Rules of Acquisition (reference book)

Market the excitement surrounding a product, rather than the product itself.

Deep Space Nine comic #22, Deep Space Mine

A comics entry, not a numbered quotation from a television episode.

Someone can earn money even in a catastrophe.

The Ferengi Rules of Acquisition (reference book)

Pursue success discreetly, without drawing attention.

Deep Space Nine · Treachery, Faith, and the Great River

Nog explicitly gives this rule the number 168 in the episode. Some reference lists instead assign 28, which conflicts with that dialogue.

Understand your enemies and continue trading with them.

The Ferengi Rules of Acquisition, p. 64

This entry comes from the reference book, not Balance of Power.

Even deception cannot diminish the appeal of earnings.

The Ferengi Rules of Acquisition (reference book)

Delay your bid until competing bidders have exhausted themselves.

Balance of Power (The Next Generation novel), p. 157

The novel’s #191 attribution is corrected to #184; this is not a DS9 television episode.

Allow others their good name; retain the wealth yourself.

The Ferengi Rules of Acquisition (reference book)

Listen to everyone, but give nobody your trust.

Deep Space Nine · Call to Arms

Deceive a Klingon only when you can escape the consequences.

The Ferengi Rules of Acquisition (reference book)

Learn about prospective customers before they arrive.

Deep Space Nine · Whispers

Quark is unsure of the number. His tentative #194 is preserved with that uncertainty and excluded from the quiz.

The prospect of earnings needs no further justification.

The Ferengi Rules of Acquisition (reference book)

New customers offer rewards but may also turn dangerous.

Deep Space Nine · Little Green Men

An answer can pose a greater danger than the question.

Deep Space Nine · Ferengi Love Songs

Advance by using employees as steps beneath you.

Deep Space Nine · Bar Association

Eat something before entering a commercial negotiation.

Deep Space Nine · The Maquis, Part I

Avoid wagering against an empath.

The Laertian Gamble (Deep Space Nine novel), p. 7

Vidiot and UFP Terminal give “empath”; ScreenRant gives “telepath.” The novel wording has not been independently confirmed, so this entry stays out of the quiz.

Removing a fish from water is no liberation.

Deep Space Nine · Past Tense, Part I

Understand the goods you are purchasing.

The Ferengi Rules of Acquisition (reference book)

Something obtained without payment may still prove extremely costly.

Deep Space Nine comic #12, Baby on Board

A distinct comic-book #218, not the reference-book purchasing rule.

Holding something counts for more than the entire law.

Balance of Power (The Next Generation novel), p. 67

Distrust someone who never makes time for oo-mox.

The Ferengi Rules of Acquisition (reference book)

Latinum endures after sexual desire has faded.

Deep Space Nine · Ferengi Love Songs

Destiny cannot be purchased.

The Ferengi Rules of Acquisition (reference book)

Do not hesitate to sell goods under misleading labels.

Deep Space Nine · Body Parts

Acquiring more is desirable; acquiring everything is preferable.

The Ferengi Rules of Acquisition (reference book)

A spouse is optional extravagance; a capable accountant is essential.

The Ferengi Rules of Acquisition (reference book)

Wealth can buy everything except a functioning conscience.

The Ferengi Rules of Acquisition (reference book)

Do not let uncertainty diminish your appetite for latinum.

Deep Space Nine · Bar Association

When uncertain, resort to deception.

The Ferengi Rules of Acquisition (reference book)

Everyone is secretly Ferengi at heart.

The Ferengi Rules of Acquisition (reference book)

Helping someone can bring punishment rather than gratitude.

Deep Space Nine · The Collaborator

Helping someone is already a reward.

Deep Space Nine · Prophet Motive

Zek’s temporary revision, not the standard rule with this number.

Business is finished once Morn has left.

Deep Space Nine · The House of Quark

Quark’s own proposed addition; Rom says no such rule exists.

Open fire before calculating the financial outcome.

Lower Decks · Old Friends, New Planets

Explicitly numbered by a Nova Fleet Ferengi in Lower Decks; its status as a formal amendment is not established. A March 2023 article predates this November 2023 episode.

Thank those you exploit so you can exploit them again.

Voyager · False Profits

Neelix’s improvised claim while posing as the Grand Proxy. It is not treated as an established rule.

A person’s worth is measured by what they own.

Enterprise · Acquisition

Krem calls this an important rule in Acquisition, but gives it no number.