Exams › IBPS PO › Quantitative Aptitude
In the number 45925639258, add 1 to each odd digit and subtract 1 from each even digit. How many 3s are there in the new number?
- 1
- 2
- 3
- 4
Correct answer: 2
Solution
After adding 1 to odd digits and subtracting 1 from even digits, the number changes digit-wise. The digit 3 appears wherever a 4 becomes 3 or a 2 becomes 3. Counting these in the transformed number gives 2 threes.
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