Digital SAT December 2025 Question Bank (12F) — The December Rosetta Stone: 392 Questions That Rebuild the Whole Month
Last updated: September 2026 · By the AllSatPapers Content Team
December 2025 has a headline document: Form 12F, a 392-question question bank that works as the month's Rosetta Stone. Not a test anyone sat — the reservoir the tests were drawn from: Reading & Writing Module 1 (108 questions), Reading & Writing Module 2 (108), Math Module 1 (88), and Math Module 2 (88), holding near-complete, sometimes duplicated copies of the live December forms. 12F overlaps 12D at 43.1% of the bank, 12E at 35.5%, and 12C at 26.3% — and still holds 74 questions that match no other document we carry. No answer key is printed in the text, so below we quote real stems, verify a working answer set ourselves, map every retune family to its bank locations, and name the exclusives.
Want the file instead of the summary? 👉 Get the December 2025 SAT bundle — 12A through 12F, one price
What's Inside the 12F File?
| Test date | December 2025 (US question bank) |
| Format | 407-page compiled bank (fully readable text, question-per-item layout) |
| Section 1 | Reading & Writing — Module 1 bank: 108 questions · Module 2 bank: 108 questions |
| Section 2 | Math — Module 1 bank: 88 questions · Module 2 bank: 88 questions |
| Total questions | 392 |
| Answer keys | None printed in the text — our team verified a working set below |
What a Question Bank Actually Is (and Why Overlaps Exceed 100%)
A bank is not a sat form. The live December forms — 12C, 12D, 12E — are 98-question exams; 12F is the 392-question warehouse behind them. It contains retuned duplicates of the live forms: one live question can appear two or three times in the bank with names, numbers, or answer letters changed — which is why, from the forms' side, 12D's overlap with the bank reaches 123.5% of the form and 12E's 117.3%. It also bundles both adaptive routes' material and is the month's best coverage per dollar: most of December's live content, plus 74 questions appearing in no form we carry.
Sample Questions — Quoted From the Parsed Text
R&W Module 2, Q59 — The Brood-Care Passage, Third Researcher
From meerkats to aphid wasps, many animals practice some form of brood care. Diying Huang and team claim to have found the earliest evidence of this behavior in insects in 163.5-million-year-old remains from the Haifanggou Formation in China…
Main idea → Answer B: Huang and team's study suggests brood care in insects began earlier than formerly established. The bank carries this family three times: R&W M1 Q100 and R&W M2 Q30 name Chenyang Cai (12D's researcher); this one names Diying Huang.
Math Module 2, Q14 / Q22 / Q45 — The Same Beaver, Three Times
The scatterplot shows the relationship between the weight, in pounds, of each of 9 pregnant beavers on April 30 and the number of offspring each beaver produced… How many offspring did the 50-pound beaver produce?
Answer: 6 — in all three bank versions the point (50, 6) sits in the coordinate list while the other eight points shift, and even the answer letters rotate (D, then A, then D). Drill the skeleton until the costume stops mattering.
R&W Module 1, Q82 — Dickens, Straight Out of Form 12E
The following text is from Charles Dickens's 1861 novel Great Expectations… "a direction which they never accepted…" As used in the text, what does the word "accepted" most nearly mean?
Words in context → Answer B: "Followed." This is 12E's R&W M1 Q1 word for word — but 12E's correct letter is C, because the bank shuffles the choice order. Woodson's Harbor Me "finding" item likewise appears twice in R&W Module 2 alone (Q82 and Q108).
Math — The Y-Intercept Family Reunion
The bank closes the loop on December's most-traveled math skeleton: "What is the y-intercept of the graph of…" appears as y = 4x + 2 (M1 Q16, (0, 2) — 12D's version), y = 6x² + 7x + 21 (M2 Q40, (0, 21)), and y = 2x² + 7x + 26 (M2 Q73, (0, 26) — 12E's version). The skill never changes: set x = 0, read the constant term.
Verified Answers From 12F — Checked by Our Team
No key is printed in this file; we solved this working set ourselves — math exactly from the parsed stems, vocabulary only where context is unambiguous.
| Location | Question (abbreviated) | Verified answer |
|---|---|---|
| R&W M1 Q2 | Tamsin Mather volcanoes — stratovolcano vs lava dome transition | C: "in contrast," |
| R&W M1 Q37 | Twain, Tom Sawyer — "surveyed" most nearly means | D: "Examined" |
| R&W M1 Q82 | Dickens, Great Expectations — "accepted" most nearly means | B: "Followed" |
| R&W M1 Q91 | Safflower oil at 510°F — "cannot absorb any more heat ______ will begin to combust" | B: "energy and" |
| R&W M1 Q100 | Brood care, K. popovi (Cai version) — main idea | A (began earlier than established) |
| R&W M2 Q26 | "Hackamore" ______ from jáquima — verb tense | B: "comes" |
| R&W M2 Q65 | Lahiri, The Namesake — "leaves" most nearly means | C: "Writes" |
| R&W M2 Q82 | Woodson, Harbor Me — "finding" most nearly means | C: "Identifying" |
| Math M1 Q1 | 51 buns, sold in packages of 12 — minimum packages (grid-in) | 5 |
| Math M1 Q2 | 6,336 yards in miles (1 mile = 1,760 yd) | D: 3.6 |
| Math M1 Q14 | Triangle base 80 cm, height 30 cm — area (grid-in) | 1,200 cm² |
| Math M1 Q23 | g(x) = √(4x − 8)(4x + 8) + 4 — value of g(2) | 4 |
| Math M2 Q4 | Line j: 4x − 6y = 24; slope of parallel line k (grid-in) | 2/3 |
| Math M2 Q12 | y = 4x; 8x − 9y = −56 — value of x + y | C: 10 |
Cross-Form Analysis: The Whole Month in One File
The bank's fingerprint against the archive — matches as a share of its 392 questions:
| Other document | Verbatim | Retuned | Family | Share of 12F |
|---|---|---|---|---|
| 2025 12D | 121 | 48 | 2 | 43.1% |
| 2025 12E | 103 | 36 | 0 | 35.5% |
| 2025 12C | 34 | 69 | 1 | 26.3% |
| 2025 9J Question Bank (September) | 1 | 27 | 2 | 7.1% |
| 2025 11D (November) | 0 | 23 | 0 | 5.9% |
| 2025 8G Question Bank (August) | 1 | 17 | 2 | 4.6% |
| 2025 5E (May) | 0 | 18 | 2 | 4.6% |
Measured from the forms' side: 12D's overlap with 12F equals 123.5% of the 12D form, 12E's equals 117.3%, and 12C's equals 60.2%. The threads backward are thinner: September's 9J bank (7.1%), November's 11D (5.9%), August's 8G bank and May's 5E (4.6% each).
👉 Get the complete December 2025 bundle — 12A, 12B, 12C, 12D, 12E, and the 12F Question Bank
The December Retune Map: Every Family, Located in the Bank
Our 12C breakdown mapped December's shared question families. Every one lands in 12F — each location verified against the bank's actual text:
| Question family | Bank location(s) | 12F's version(s) |
|---|---|---|
| Fossil brood care (K. popovi, Haifanggou) | R&W M1 Q100 · R&W M2 Q30 · R&W M2 Q59 | Three versions: two name Chenyang Cai, one names Diying Huang |
| Lighthouse keepers (notes) | R&W M1 Q73 (+ Q85, Q98) | Elizabeth Smith (New York) paired with Thelma Austin (California) |
| Hours worked 1950–2017 (econ data) | R&W M1 Q84 | Netherlands version — identical to 12E's R&W M1 Q8 |
| Hidalgo municipalities (notes) | R&W M1 Q65 · R&W M2 Q76 | Two retunes of the town-population notes |
| Stony coral depth table | R&W M1 Q29 · R&W M1 Q99 | Agaricia grahamae, Acropora bushyensis & co. |
| Taam Ja' Blue Hole | R&W M2 Q74 | Full echo-sounder/CTD passage (274 m vs 420 m) |
| Great Salt Lake salinity | R&W M2 Q27 | 12E's Ephydra cinerea vs Achromobacter version |
| "Mustang"/"hackamore" etymology | R&W M2 Q26 · Q33 · Q101 | Three versions — "hackamore" (twice) and "quirt" |
| Apollo Moon sensors | R&W M1 Q49 · R&W M2 Q17 | 1969–1972 instruments, obsolete-storage data |
| Cooking-oil smoke point | R&W M1 Q91 | Safflower oil at 510°F (12C: sesame, 410°F) |
| Indigenous songs / languages | R&W M2 Q92 | Kwakwaka'wakw clam-garden and Karen bee songs |
| Pregnant beaver scatterplot | Math M2 Q14 · Q22 · Q45 | Three coordinate sets; the 50-pound beaver always produced 6 offspring |
| Chimpanzee UVB adaptation | R&W M1 Q69 · R&W M2 Q91 | Sophie Moittié's zoo-chimpanzee vitamin D study |
| DOM2 horse domestication | R&W M1 Q79 · Q83 | Two near-identical completions; only the site list changes |
One longer chain: the bank holds two Dolly Parton / Appalachian ballads items (R&W M1 Q39 and Q44) — siblings of 12C's R&W M1 Q25 — a family our 12C breakdown traces to June 2026's 6A form.
74 Questions Found Nowhere Else
After matching the bank against every December form, the November set, and the rest of the archive, 74 of its 392 questions have no match anywhere. A sample:
- The Devon A. Mihesuah notes question — the Choctaw Nation novelist (R&W M1 Q70)
- Two Norse-Greenland cross-text pairs (R&W M2 Q40 and Q64)
- The sashiko embroidery cross-text — kikko (tortoiseshell) motifs (R&W M2 Q52)
- Two European high-speed-rail hub tables (R&W M1 Q5 and Q43)
- The rattlesnake live-birth study (Math M1 Q62)
- Two copies of the 2015 fish-behavior study (R&W M2 Q58 and Q79)
- The emulsification item (R&W M2 Q99)
- The forest-restoration networks item (R&W M2 Q16)
Deep Analysis: What 12F Contains, Module by Module
Reading & Writing (216 questions)
The Module 1 bank leans on Craft & Structure (23) and grammar (21); the Module 2 bank tilts harder toward Standard English Conventions (25), with eleven notes-synthesis items and five cross-text pairs. Vocabulary-in-context runs 27 deep across the two modules: Dickens, Twain, Lahiri, and Woodson all appear, most more than once.
Math (176 questions)
Both math banks are deliberately speed-mixed: geometry and trigonometry (26 items) and linear equations (22) form the spine, with systems, functions, and statistics layered in. Easy-route markers — the 51-buns ceiling division, the 6,336-yard conversion — sit beside hard-route markers like rational-function constants and radian conversions.
Tips for Students Using 12F
- Drill by family, not by page. Pull all three brood-care items (R&W M1 Q100, M2 Q30, M2 Q59) in one sitting.
- Never memorize letters. The bank reshuffles choice order between copies — Dickens's "accepted" is B here and C in 12E.
- Use the duplicates as a retest clock. Miss the beaver scatterplot at M2 Q14? Redo it as Q22 a week later, Q45 a week after that.
- Pair the bank with one live form. Sit 12D or 12E under a timer; mine 12F for reps on whatever hurt you.
- Treat the 74 exclusives as fresh difficulty — ideal for a final untimed pass.
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