Discussion
A number is first decreased by 20% and then increased by 15%. The number so obtained is 64 less than the original number. The original number is :
Answer: D
The original number is 800.
Decreasing by 20% and then increasing by 15% multiplies the number by \(0.8 \times 1.15 = 0.92\). The result is 8% less than the original, and that 8% equals 64:
\[ 0.08N = 64 \Rightarrow N = 800 \]
Check: 800 falls to 640, then rises to 736, which is 64 less than 800. 850, 750 and 700 give differences of 68, 60 and 56.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development