Discussion
Which of the following number is not divisible by 72 ?
Answer: D
The number not divisible by 72 is 95142.
Since 72 = 8 × 9 and 8 and 9 have no common factor, a number is divisible by 72 when it is divisible by both 8 (last three digits divisible by 8) and 9 (digit sum divisible by 9).
95142: the last three digits 142 are not divisible by 8, and the digit sum 21 is not divisible by 9, so it fails.
The others pass both tests: 88848 (848 = 8 × 106, digit sum 36), 88704 (704 = 8 × 88, digit sum 27) and 95112 (112 = 8 × 14, digit sum 18).
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