Subject: General Aptitude · Chapter: H.C.F. and L.C.M. of Numbers · Exam: · Marks: · Difficulty:
If the L.C.M. of three numbers is 9570, then their H.C.F. can be
(a)11
(b)12
(c)19
(d)21
Answer
Answer (as printed): A
Explanation
The factors of 9570 are 2, 3, 5, 11 and 29. Clearly, H.C.F. can be any of these factors occurring not more than once and no number other than 2, 3, 5, 11 or 29 or having any factor other than these, can be the H.C.F. So, the only possibility is 11.
Explanation as extracted from the printed page; notation may be imperfect.