What is the recommended DILR study sequence and source for CAT preparation?
Start with Logical Reasoning arrangement sets (seating, scheduling, grouping) before touching Data Interpretation, and use Elites Grid's LRDI video explanations as your primary resource. This sequence works because arrangement problems teach you to build visual frameworks and track constraints, skills that transfer directly to the non-linear thinking CAT demands in both LR and DI.
The proven DILR study sequence
Begin with pure Logical Reasoning topics in this order: arrangements (linear and circular seating), selection problems (picking teams or subsets with conditions), and distribution problems (allocating items to groups). Spend two to three weeks here.
These topics reward systematic notation and have clear right-or-wrong paths, which builds confidence. After you can solve 70% of Level of Difficulty 1 (LOD1) arrangement sets within eight minutes, add Data Interpretation: start with tables, then bar charts and line graphs, followed by pie charts and combination charts.
Only after four weeks of the above should you tackle games, tournaments, and mixed constraint sets. These are CAT's hardest territory.
Games involve rule-based scenarios (think "five friends play cards across three rounds with these win conditions"), while tournament problems require tracking match outcomes and points tables. Both demand fluency in the constraint-handling you learned from arrangements.
Why Elites Grid works for self-study
Elites Grid's free YouTube channel offers 500+ LRDI sets with video solutions, tagged by LOD and topic. The instructor builds solutions on-screen in real time, showing false starts and recovery, which mimics exam conditions better than polished solutions in books.
Watch each video once without pausing, attempt the set yourself with a 12-minute timer, then rewatch the video to compare approaches.
The platform's LOD system mirrors CAT scoring: LOD1 sets appear in nearly every exam, LOD2 sets separate 85th percentile from 95th, and LOD3 sets are reach problems. Focus 60% of your time on LOD1 and LOD2.
Even when you get sets completely wrong in the first 15 attempts, continue. Pattern recognition for DILR is not instant; most students report fluency clicks after solving 20 to 25 sets of a given type, not five or ten.
Common pitfalls and how to avoid them
Do not jump topics every three days because you find one hard. Stick with arrangements for at least 12 sets before moving on.
Also, avoid collecting sets from ten different sources; this fragments your learning because every resource uses different notation systems. If you supplement Elites Grid, use official CAT papers from 2017 onward (available on the IIM website) or Cracku's sectional mocks, which faithfully replicate CAT's difficulty curve.
Many students waste time on Arun Sharma's 1000+ page LRDI book. While comprehensive, it includes pre-2017 puzzle types (like Sudoku variants and pure cryptarithmetic) that no longer appear on CAT.
The exam now tests decision-making under ambiguity, not mechanical puzzle-solving.
Tracking progress numerically
After 40 sets across all topics, you should be solving 2 out of 4 sets correctly in a 40-minute window at LOD1/LOD2 mix. By 80 sets, target 2.5 to 3 sets with 85%+ accuracy. Students who reach this benchmark typically score 92 to 96 percentile in DILR on CAT, enough for calls from IIM Lucknow, IIM Kozhikode, and all new IIMs.
Pro Tip: Keep a one-page error log in a notebook, not digitally. After every set, jot down the mistake type: calculation error, misread constraint, poor set choice, or time pressure.
When the same error appears four times, you have found your actual weakness. This handwritten log becomes your revision Bible in the final two weeks before CAT.