CAT 2025 Slot 3 · DILR · Question 11
CAT 2025 Slot 3 previous year question on Mixed DI (Radar, Triangular, Stock etc), with the answer and a step-by-step solution.
Set 3: Puzzle Solving Competition — this question belongs to a set. Read the full set with all 4 questions →
Anirbid, Chandranath, Koushik, and Suranjan participated in a puzzle solving competition. The competition comprised 10 puzzles that had to be solved in the same sequence, i.e., a competitor got access to a puzzle as soon as they solved the previous puzzle. Some of the puzzles were visual puzzles and the others were number-based puzzles. The winner of the competition was the one who solved all puzzles in the least time.
The following charts describe their progress in the competition. The chart on the left shows the number of puzzles solved by each competitor at a given time (in minutes) after the start of the competition. The chart on the right shows the number of visual puzzles solved by each competitor at a given time (in minutes) after the start of the competition.
How many minutes did Suranjan take to solve the third visual puzzle in the competition?
Answer & solution
Answer: 2
First identify which puzzles are visual. Koushik's visual count rises at minutes 2, 12, 25 and 29, exactly when he solves puzzles 1, 4, 8 and 9. So the visual puzzles are 1, 4, 8 and 9, and the third visual puzzle is puzzle 8.
Suranjan (blue) solves puzzle 7 at minute 26 and puzzle 8 at minute 28. (His visual count rises to 3 at minute 28, confirming this.)
Time for puzzle 8 = 28 − 26 = 2 minutes.
Shortcut: match the jumps in the visual chart to the jumps in the all-puzzles chart to find the puzzle numbers, then read the time between consecutive steps.
Hence, the answer is 2.
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