CDS Maths, 2016 to 2026: 2,096 questions, and Trigonometry up from 9 to 13 a paper

Trigonometric Ratios and Identities: 8.78 → 11.67 → 13.00 questions a paper

It has risen in each window and has not dropped below 13 questions in any of the last four papers. If your preparation has one priority, it is this chapter.

Number System: 9.78 → 9.50 → 13.00 questions a paper

Its recent rate is up, but single papers range widely — one had 25 questions, another 4. Treat it as a large chapter every paper, not a growing one: prepare it fully and do not read the average as a promise.

Statistics: 3.78 → 2.67 → 5.00 questions a paper

Two of the last four papers set eight or more questions. It stays one of the cheapest chapters to prepare, so the rise makes it worth more.

Quadrilaterals: 2.44 → 1.67 → 3.67 questions a paper

It was a two-question chapter; two of the last three papers set six or more.

Mensuration 3D: 8.11 → 9.67 → 6.67 questions a paper

Still a cornerstone chapter at several questions a paper, but below its middle-window peak. Do not cut it; do not give it more time than Trigonometry.

Linear Equations: 2.67 → 2.50 → 0.17 questions a paper

It has set one question in the six most recent papers. The skill — turning words into two equations — still carries most arithmetic questions, so learn it through those chapters rather than as its own.

Time and Work: 2.67 → 2.33 → 1.33 questions a paper

Three of the last four papers set none. It is still quick to learn, so keep it, but after the rising chapters.

Data Interpretation: 2.56 → 3.17 → 1.67 questions a paper

Seven of the 21 papers set a block of four to eight questions around charts; the rest set three or fewer, often none. When it appears it is cheap marks, so learn to read the four chart types; do not count on it.