CAT 2025 Number System — Previous Year Question
Year
CAT 2025
Section
Quantitative
Topic
Number System
Difficulty
Medium
Question
Slot-1
If a, b, and c are all positive integers, with 4a > b, then which of the following conditions is BOTH NECESSARY AND SUFFICIENT for the expression to be a positive integer?
a − b = c
a − b + 2c is divisible by 3
a, b, and c are divisible by 3
a − b and c are divisible by 3
None of the other conditions is both necessary and sufficient
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