Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:
How many of the following numbers are divisible by 3 but not by 9? 2133, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276
(a)5
(b)6
(c)7
(d)None of these
Answer
Answer (as printed): B
Explanation
Sum of the digits in respective numbers is: 9, 12, 18, 9, 21, 12, 18, 21, 15 and 24. Out of these 12, 21, 12, 21, 15, 24 are divisible by 3 but not by 9. So, the number of required numbers is 6.
Explanation as extracted from the printed page; notation may be imperfect.