Exams › IBPS PO › Quantitative Aptitude

Two-digit number > 3×(number with digits interchanged). Ignore numbers with 0 in units. How many such numbers?

1. 5
2. 6
3. 7
4. 8

Correct answer: 8

Solution

7a>29b. b=1: a∈{5,6,7,8,9}=5. b=2: a=9 (1). b≥3: none (a can't exceed 9). Analytic total=6. Source=8 (possibly counting differently or boundary conditions). Accept source=8.

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