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DILR, the great differentiator

Scores here are low across the board, so even modest mastery vaults your percentile. The whole skill is set selection + calm structuring.

The two-pass method

This is how you survive 40 minutes and 5 sets without panicking. Rehearse it until it's automatic.

1Pass 1 (first ~3 minutes): read all 5 sets. Rate each Easy / Medium / Hard by how clearly you can see a starting point. Do not start solving yet.

2Pass 2: solve your 2 easiest sets completely first, lock in ~8-10 marks. Then attack a third. Only touch a fourth if time and a clear entry point both exist.

3Hard ceiling: 9-10 minutes per set. If it isn't cracking, walk away, no exceptions.

The target 3 sets solved cleanly ≈ 96-99%ile. You are not trying to do all five, you're trying to pick the right three and nail them.

Set types to drill until automatic

Logical Reasoning sets
  • Linear & circular arrangements
  • Distribution / grouping (people → attributes)
  • Selection with conditional rules
  • Tournaments, games, scheduling
  • Networks, routes, ordering
Data Interpretation sets
  • Tables & multi-table reasoning
  • Bar / line / pie + % change
  • Caselets (text → structure)
  • Venn-diagram DI
  • DI fused with a logic constraint (a modern CAT favourite)

How to actually build DILR

There's only one method that works: volume of varied sets + ruthless review.

1Solve 2-3 fresh sets daily. Variety matters more than count, rotate types.

2After each set, ask: "What was the key insight that unlocked it?" and "Could I have spotted it faster?"

3Catalogue those insights in your insight library (see the Mock Engine). DILR mastery is a personal library of recognised patterns.

Gold-standard practice: past CAT DILR sets 2017-2025, supplemented by one mock series and your own builder sets.

The DILR trap, train the exit, not just the entry The hardest skill is letting go. One stubborn set can eat 20 minutes and tank the section. In every practice session, deliberately force yourself to abandon a set at the 10-minute mark if it isn't cracking. Practising the walk-away is as important as practising the solve.