Concept: The question tests on Number properties
Solution:
Is n a multiple of 140. i.e is n = 140, 280, 420 ....
Statement 1: n is a multiple of 10
n = 10 is a multiple of 10, but 10 is not a multiple of 140 (it is a factor of 140)
Answer options could be B, C or E Therefore Statement 1 Alone is Insufficient
Statement 2: n is a multiple of 14.
n = 14 is a multiple of 14, but not a multiple of 140.
Answer Options could be C or E Therefore Statement 2 Alone is Insufficient.
Combining Both Statements: n is a multiple of 10 and 14 i.e LCM of 10 and 14 = 70
n = 70 is a multiple of 10 and 14, but is not a multiple of 140
Therefore Both Statements together are Insufficient.
Option E