ISI B.Stat / B.Math (UGA) on ViJEEta — the bank, the marking, and the gaps

The objective paper of the ISI B.Stat/B.Math admission test — the one exam that pays you for leaving a question blank. Free, in the browser or the Android app.

How the ISI paper is marked

This is the rule almost every other paper in India does not have: ISI pays you +1 for leaving a question alone. A wrong answer costs nothing directly, but it costs you the +1 you would have banked — so the penalty is real, it is just hidden in the opportunity cost.

On a 4-option question a blind guess is worth 4 × 1/4 = 1 mark — exactly what the blank pays. Pure guessing gains nothing on average. Eliminate a single option and the same question is worth 4 × 1/3 ≈ 1.33: now answering wins. The whole of ISI UGA strategy is that one comparison, and it is why "attempt everything" advice is actively wrong here.

Pattern source, carried verbatim from the constants the app grades with: ISI UGA pattern (2026 sources); UGB is subjective, never auto-graded. That registry records this pattern as researched from secondary 2026 sources and not yet checked against ISI's own admission notice, so treat the marks and the duration on this page as unconfirmed until it has been. The option count per question is not a constant we hold either, so the break-even above is stated for k options generally. UGB, the subjective paper, is proof-based and ViJEEta never auto-grades it — the same refusal we apply to RMO and INMO.

Chapters, by subject

865 of those questions are gradeable and served across 24 chapters — a chapter needs at least 10 gradeable questions before it gets a page here, so this list is shorter than a syllabus and longer on substance.

What ViJEEta has NOT measured for ISI

The gaps are listed here, near the top, rather than left for you to discover:

• Chapter weightage: not measured. The JEE weights are read from a per-subject weightage file that ships with the JEE bank, carrying each chapter's weight and the question count behind it. No such file exists for ISI. Every weightage number on this site comes from that one source, and every chapter without one reads "—".
• Percentile and rank: not offered. ISI has no ViJEEta-fitted percentile curve, and we never borrow another exam's. A score without a curve is shown as a score, not as a rank.
• Difficulty calibration is partial. 93% of the ISI bank carries a measured IRT difficulty; the rest is served without adaptive targeting, and this page will say so until it changes.
• A single ISI readiness score: not computed yet. The JEE /300 is a weighted sum — Σ chapter_weight × mastery — so it follows directly from the first bullet that there is no ISI number to show. ISI carries the real paper's scale of 120 and per-chapter mastery is measured today, but the headline score arrives only when the weights underneath it do. The app deliberately shows no ISI readiness band for exactly this reason.

What you do get for ISI today is per-chapter mastery on real evidence, from chapters you have actually answered questions in — never a number for a chapter you have not touched. How the readiness score works sets out the same rules for JEE.