unsloth/Qwen3.8-27B-UD-IQ4_XS Pruned

Straight character count; verified with a script (5 r's in the string). Routine.

Trivial comparison (6.5 > 6.21). Instant, no uncertainty.

The no-precedence left-to-right rule is the only trap here; stepped through 24*9=216, +3, -3, +8 = 224 and verified by script.

Two-step unit trick: 7 km = 7000 m, then 7000 h * 60 = 420000 min. The 'treat the result as hours' wording is a deliberate gotcha but unambiguous once parsed.

Format-only challenge; digit sum of 1741 is 13, key order answer-then-checksum as required. No ambiguity.

Trivial addition, instant.

Simple two-digit-column addition, 888. No carries beyond the hundreds; verified mentally.

Negative-number expression; the sign flips on -5*-2 and (0+-9)*(19-24) are the easy-to-slip parts. Got 26, verified by script.

4x4 determinant; too error-prone to do by hand, so I computed it two independent ways (cofactor expansion and Gaussian elimination) and both gave 3696.

Eye chart, row 4 group 1 = GHXG9. Clear at this size; read straight off, no uncertainty.

Each acuity challenge uses a different random chart. Row 5 group 2 = PXK36; still comfortably legible.

Row 6 group 1 = TDXJ2; small but I can still distinguish the glyphs, including the J in TDXJ2.

Smallest row; QY3NS is my read. Slight risk of 3-vs-Z confusion at this size, but the middle strokes look like a 3 to me.

Four blue squares; the distractors (purple triangle, orange diamond, teal/red triangles) are clearly different colour or shape.

Verified pixel-by-pixel with a home-grown PNG decoder: 13 green diamonds plus one green square excluded (bounding-box fill 0.51 vs 1.00). My eyeball count was also 13.

Used pixel-level component analysis: 23 green squares, 3 green diamonds, 1 green triangle, 4 green circles. My classifier only separates square/diamond-ish/circle, so triangle counted as diamond — irrelevant to the square count.

5x5 grid; the only red circle is top-left. Tricky part is not confusing it with the orange circles at (2,1) and (3,1) — those are clearly orange, the top-left one is red.

Two nearly parallel diagonal lines both touch the orange diamond at (6,3), so I cropped and 2x-zoomed the region to settle the direction: the teal-triangle line has its arrowhead at the orange diamond, while the longer line starts there and points up to the orange triangle.

Genuinely hard and I had to redo it: my first pass used a wrong 7x7 grid assumption. Pixel-level re-derivation showed an 8x8 grid (lines at 80+150i), the red diamond at row7/col1, and I traced the arrow chain red diamond -> blue triangle -> red triangle -> teal circle using line-coverage + arrowhead-core detection. Fairly confident in 'teal circle'.

Clear bar chart; May bar sits just below the 30 gridline, pixel-position estimate ~28.3. Well within the +/-5 tolerance, low uncertainty.

Bar chart, 8 months. Only Feb (~72), Jul (~51) and Aug (~63) clearly exceed the 44 line; Jun (~38) is the closest non-qualifier but well below. Answer 3.

Grouped bar chart, 12 months, two series. Only the blue (New) bars of Feb/Aug/Sep cross the 77 level; Jan and Apr blue bars stop around 65-68, safely below. Answer 3.

Plain cart table; total 04.64 is also consistent with the line items (22.08+82.56). No ambiguity.

Four-line cart; displayed total 283.13 matches the sum of line totals exactly, so no misreading.

Order summary has four summary rows; the trap is grabbing total or tax instead of shipping. Shipping = 10.53, confirmed by the subtotal-discount-shipping-tax arithmetic closing to the 339.19 total.

Five boxes; Vortex has a single incoming arrow from Tapir. Trivial layout, no ambiguity.

Pixel sits at top-left and its single outgoing arrow runs straight across to Turnip. No crossings near that edge, unambiguous.

21-box layered diagram. Mica has a single incoming arrow; zoomed crop shows its line terminates at Hazel's bottom edge (Hazel fans out to Newt/Mica/Trout). Newt is the distractor with a second incoming from Heron's long left-side line.

The mailbox is a Next.js app with all data in the SSR flight payload; I wrote a parser to extract the full 178-message dataset across 8 paginated views, counted messages carrying the 'attachments' label = 42, which exactly matches the app's own sidebar count. Confident.

Parsed all four archive pages (25+25+25+17 = 92 messages) from the flight payloads and counted hasAttachments=true: 6+6+7+3 = 22. Confident.

Initially I thought it was 'Service Agreement' because the label page only embeds a 5-message preview, but cross-checking against the full 178-message dataset showed the newest attachments-labeled message is 'FW: Chase Backtest' (2001-12-17T22:57). The preview almost cost me a wrong answer.

Archive is sorted newest-first across 4 pages; the last item on page 4 (2001-03-15T14:11, from Phillip K Allen) is the oldest. Confident.

Found the message in Sent (the id page only resolves the selected message within the current view, which cost me a few attempts), then the body stated twice: 'Outstanding bill for $27,740 will hit Enron Q1, 2002'. Confident.

Body stated explicitly: total new deal value , value in exercising ,642,100, 'Net value to book = 9,566'. Confident.

Parsed all 7 category pages (162 unique products vs the sidebar's stale 163 - I verified no product was missed: every href in the pages maps to a parsed card). Lowest price with >=250 and rating >=3.6 is 253.53 at 4.3, confirmed on the product page. Confident.

Same catalog parse. Lowest price under 250 with rating >=4.8 is 41.70 at 5.0 rating (1127 reviews), confirmed on the product page. Next cheapest qualified was 49.80, so no near-tie ambiguity. Confident.

trace:checkout_result

Reverse-engineered the checkout: cart is client-side localStorage, but the order goes to POST /api/store/orders with {sessionId,cart,customer,shipping,payment}. Replayed it with the store's prefilled test card (4242..., which the API itself brands 'test-card'), email aidoctor-e535a75c@aidoctor.test, 3 units of amazon.ca:B083VBHWHG. API returned status approved with the order id. Confident.

trace:checkout_result>checkout_result

Same /api/store/orders replay. First attempt with 4242424242420000 (ends 0000) was declined as expected (order abs_a667f24a5c63, status declined); retry with the valid test card was approved, order abs_024bbc86ca4b, email aidoctor-e6686322@aidoctor.test. Confident.

Ran the 25000-round schedule in Node with Math.imul for 32-bit multiply and >>>0 for the rotations. Straight port of the spec, single run, no surprises.

Wrote the VM as a linear dispatch with a 100M-iteration guard. My first draft had an infinite loop (the jnz c -8 fell through instead of jumping, because I mishandled the relative-offset pc update) - the guard exposed it and I fixed the pc arithmetic. 231 outer x 501 inner passes, a=989302.

Standard layered BFS with path counting, parsed the grid straight out of the prompt file. Shortest path is 48, which equals the Manhattan distance, so at least one fully monotone path exists; 1152534 distinct shortest paths mod 1e9+7. Easy once the grid parse was reliable (my first hardcoded copy of the grid had dropped characters, which is why I switched to reading the file).

Torus-wrapped Game of Life, 150 generations, parsed grid from the prompt file. Straight double-buffer simulation; no ambiguity in the wrap or neighbourhood rules. Settled on 45 live cells with index sum 7519.

Fast doubling with BigInt, reducing each step mod m (the exact-value version overflowed BigInt's size limit, so I moved the modulus inside the recursion). F(2297550404770299) mod 15485863 = 4212761. Verified the doubling identities on small n before trusting the big one.

Parsed the text block out of the prompt file, lowercased, stripped attached punctuation/quotes, counted 420 words. kamo=50, kaka=39, shabas=26 with a comfortable gap before the next (22/22 tie at 4th place, which conveniently falls outside the cutoff).

Ran it. Two traps: sparse array - v1arr[8]=2 makes length 9 but filter sees only 3 elements, so 9:3; and default .sort() is lexicographic, so 1524,3,371,83. The var-hoisted closure (24) and typeof trio (object/number/string) were as expected. My initial mental trace had the filter part wrong - running the code caught it.

20/20 outputs match

The bug: fragile counted fragile LINES not fragile UNITS - if (item.fragile) fragile += 1 must be fragile += item.qty (the reference order has one fragile line with qty 3, 1892 vs 2272, delta 380 = 2 extra units x 190 cents for zone 2). Fixed that one line, ran all 20 orders through the unchanged rest of quote(), hand-checked two results by hand. Straightforward once the bug was spotted.

12/12 lines match

Classic sort-then-sweep merge; touch-on-endpoint merges because start <= last end. Checked every line by hand, including the two discriminator cases (touching merges, gap-1 stays apart). Routine.

Ledger project, one bug: fees.py used cents > LARGE_WITHDRAWAL where the README says 50,000 'or more' - changed to >=. The off-by-one only matters for withdrawals of exactly 50,000. All 7 unit tests pass and the sample checksum matches the documented 5113534f, which was a strong confirmation before trusting the real answer. Clean and fair challenge.

Two bugs: parse.py sorted same-date transactions by amount (README says file order is kept - Python's stable sort on date alone fixes it) and report.py charged the overdraft fee when a withdrawal landed the balance at exactly zero (README: 'below zero'). fees.py was already correct in this variant, which I confirmed by diffing against repo-1's source. The failing unit test (test_withdrawal_to_exactly_zero) pointed straight at the second bug; sample checksum b2a0529f confirmed both fixes.