10 exercises — how "last but not least" closes an enumeration while signaling equal importance, and how it differs from plain "lastly."
Quick reference
Last but not least: closes a list while signaling the final item is no less important
Fixed word order: "last" + "but" + "not" + "least" — never inflected or scrambled
Contrast: plain "lastly" is a neutral sequencer with no such reassurance
Needs a real list: shouldn't attach to a single, unrelated event
Register: neutral, common in both spoken presentations and written lists in docs
0 / 10 completed
1 / 10
A release note reads: "This release adds dark mode, fixes the export bug, improves load times, and, ___ , adds two-factor authentication." Which phrase best introduces the final item in a list without implying it's the least important?
Last but not least introduces the final item in a list while explicitly signaling that its position doesn't reflect low importance. The other options are not valid English phrases — they garble the fixed idiom into nonsense.
2 / 10
Which sentence uses "last but not least" correctly?
"We'd like to thank the backend team, the design team, the QA team, and, last but not least, the on-call engineers who kept things running during launch week" correctly closes a list of items, crediting the final one as no less important than the rest. It cannot introduce a bare future plan, an instruction, or a past time reference with no preceding list.
3 / 10
Fill the blank: "The migration required updating the schema, rewriting the ORM layer, retraining the team, and, ___ , writing a rollback plan."
Last but not least has a fixed word order: "last" + "but" + "not" + "least." The other options scramble this into invalid, non-idiomatic sequences.
4 / 10
Which pair correctly distinguishes "last but not least" from simply "lastly"?
"Last but not least" carries a built-in reassurance: "We reviewed security, performance, and, last but not least, accessibility." Plain "lastly" is neutral and sequencing-only: "Lastly, we ran the load test." Swapping them changes whether you're implying the final item deserves equal weight.
5 / 10
A design doc reads: "The new API must be backward-compatible, well-documented, rate-limited and, ___ , observable." Which best completes the sentence?
Last but not least is the correct, fixed form. The other options scramble the required word order into non-idiomatic phrases.
6 / 10
Which sentence contains an error in the use of "last but not least"?
"Last but not least that we discussed at the offsite, the server rebooted overnight" incorrectly attaches a relative clause and applies the idiom to a single unrelated event rather than the final item in an enumerated list. The other three sentences use it correctly, each closing a genuine list.
7 / 10
Choose the sentence where "last but not least" is best replaced by "and equally important" without changing the meaning.
"…and, equally important, boosts mobile conversion" preserves the meaning exactly, closing out a genuine list of benefits. The other options misuse the phrase as an urgency marker, an unrelated possessive-sounding construction, or a pairing with a specific future date.
8 / 10
A postmortem states: "We're improving alert thresholds, adding a staging gate, documenting the runbook, and, ___ , scheduling quarterly game days." Which best fits?
Last but not least is the correct, fixed form — none of the four words are inflected. Option A wrongly pluralizes "last" as a verb. Option B wrongly pluralizes "least." Option D wrongly replaces "not" with "no."
9 / 10
Which register note about "last but not least" is accurate?
"Last but not least" is a neutral phrase equally at home in spoken presentations ("…and last but not least, thanks to everyone on support") and written lists in design docs. It always closes an enumeration while reassuring the audience the final item matters just as much as the earlier ones.
10 / 10
Which sentence best demonstrates "last but not least" closing a list of technical review criteria?
"Before merging, we check for correctness, test coverage, code style, and, last but not least, whether the change is actually necessary" is the textbook use: closing a genuine list while treating the final criterion as no less important. The other options misuse the phrase as a command intensifier, insert it awkwardly mid-clause, or pair it incorrectly with a specific future date.