9 original Central Ideas and Details questions, easiest first. The main idea of a passage, or a detail it actually states. Answer them all, then submit once to see every answer explained.
Medieval European monasteries are often remembered primarily as centers of prayer and religious study, but surviving account books reveal that many also functioned as sophisticated agricultural enterprises, managing extensive farmland, livestock, and trade in surplus goods.
Which choice best states the main idea of the text?
B — In addition to their religious role, many monasteries also functioned as substantial agricultural and economic enterprises.. The passage states monasteries are 'often remembered primarily as centers of prayer' but records reveal an additional agricultural/economic function—matching choice B's emphasis on this expanded role.
Although caffeine is best known for its stimulant effects, researchers have found that it also enhances the consolidation of long-term memories when consumed shortly after a learning task, suggesting its cognitive benefits extend beyond simple alertness.
Which choice best states the main idea of the text?
B — Caffeine may aid memory consolidation in addition to its known stimulant effects.. The text states caffeine 'also enhances' memory consolidation, indicating an additional benefit beyond alertness—this matches choice B; choice A contradicts the passage's 'beyond simple alertness' claim.
Medieval European cathedrals are often remembered primarily as centers of religious worship, but historical construction records reveal that their building sites also functioned as informal training grounds where traveling stonemasons developed and exchanged engineering techniques later applied to bridges and fortifications.
Which choice best states the main idea of the text?
C — In addition to their religious role, cathedral construction sites also served as centers for developing engineering knowledge.. The passage states cathedrals are 'often remembered primarily as centers of religious worship' but records reveal an additional engineering-knowledge function—matching choice C's emphasis on this expanded role.
Ancient Phoenician sailors are often remembered primarily for their trading voyages across the Mediterranean, but inscriptions found at colonial outposts reveal that Phoenician settlements also developed distinct local governance systems, adapting their home city's political practices to fit each colony's specific circumstances.
Which choice best states the main idea of the text?
A — In addition to their trading role, Phoenician colonies also developed their own adapted governance systems.. The passage states Phoenician sailors are 'often remembered primarily for their trading voyages' but inscriptions reveal an additional governance-development function—matching choice A's emphasis on this expanded role.
Although turmeric is best known for the compound curcumin and its anti-inflammatory properties, researchers have found that another compound within the spice appears to improve the body's absorption of iron from plant-based foods when consumed together, suggesting turmeric's nutritional benefits may extend beyond its anti-inflammatory effects.
Which choice best states the main idea of the text?
D — Turmeric may aid iron absorption in addition to its known anti-inflammatory effects.. The text states another compound 'appears to improve' iron absorption, indicating an additional benefit beyond anti-inflammatory effects—matching choice D; choice A contradicts the passage's claim of extended benefits.
Certain species of jumping spider possess unusually acute vision for their small size, with specialized retinal structures that allow them to see in a level of detail comparable to much larger animals. As a result, these spiders can visually distinguish prey from potential mates at distances that would be impossible for most other spider species relying primarily on vibration sensing.
Which choice best states the main idea of the text?
B — The jumping spider's acute vision allows it to visually distinguish objects at unusually far distances for its size.. The passage links the specialized retinal structures to the spider's documented ability to visually distinguish objects at unusual distances—matching choice B directly.
While workplace productivity is often assumed to decline sharply after a certain number of consecutive work hours, several studies have found that the specific type of task being performed—routine versus creative—predicts the timing of that decline far more strongly than total hours worked alone.
Which choice best states the main idea of the text?
B — The type of task performed influences when productivity declines more strongly than total hours worked does.. The passage states task type 'predicts the timing of that decline far more strongly than' total hours—the main idea is that task type outweighs hours in determining decline timing, which is choice B; choice D overstates a specific direction the text doesn't confirm.
Contrary to the popular image of medieval Europe as uniformly illiterate, recent research into surviving merchant ledgers and personal letters suggests that basic literacy was more widespread among urban tradespeople than previously believed, even if formal, Latin-based scholarly literacy remained rare.
Which choice best states the main idea of the text?
C — Basic literacy among medieval urban tradespeople may have been more common than the popular image suggests.. The passage directly challenges the 'popular image' of uniform illiteracy, citing evidence that basic literacy among tradespeople was more widespread than believed—choice C restates this central claim accurately.
While tipping is often assumed to reward good service, several studies have found only a weak correlation between service quality and tip size; factors such as the server's smile, physical touch on the customer's arm, and even the weather have been shown to influence tip amounts more strongly than measurable service quality.
Which choice best states the main idea of the text?
C — Factors unrelated to actual service quality often influence tip amounts more than service quality itself.. The passage lists several factors (smile, touch, weather) shown to influence tips more than service quality—the main idea is that non-service factors often outweigh quality in determining tips, which is choice C.
Score:
Every question above is now marked up: the correct answer is highlighted, any wrong option you picked is flagged, and each explanation is open.
No. Every question here is original, written to the College Board's published Digital SAT Reading & Writing specification for the Central Ideas and Details skill. No retired or copyrighted College Board material appears anywhere on this site.
Central Ideas and Details asks either for the main idea of a short passage or for a specific detail the passage states. Both are answered entirely from the text — nothing is inferred, nothing is brought in from outside — but the main-idea version requires the choice to cover the whole passage rather than one part of it.
For a main-idea question, summarise the passage in one sentence before looking at the choices, then eliminate any choice that is true of only one sentence. For a detail question, find the exact line the question points at and match against it word by word — the correct choice paraphrases it, but it never adds to it.
No, and deliberately so. This drill is 9 Central Ideas and Details questions back to back; a real Reading & Writing module is 27 questions in 32 minutes drawn from all eleven skills. Use a drill to fix one weakness, then take a full module to practice the real thing.
No. The SAT has no penalty for a wrong answer — a blank and a wrong guess both score zero — so answer every question, including the ones you have to guess.