Question

A student can divide her books into groups of 5, 9 and 13. what is the smallest possible number of the books ?
A) 487
B) 585
C) 635
D) 705

Answer 1

Answer: B)585

Step-by-step explanation: Since 5 and 13 are prime 65 should be one of factor and 65×9= 585

Answer 2

The smallest possible number of the books that the student can divide into groups is the L.C.M. of 5,9 and 13

L.C.M. = 585

∴ The answer = (B) 585