Bunuel wrote:
Is the positive integer p a multiple of 50?
(1) p is a multiple of 10
(2) p is a multiple of 5
Required: Is p a multiple of 50?
Statement 1: p is a multiple of 10
P can be 10, 20, 30, 50, 100 etc.
Therefore p may or may not be a multiple of 50
INSUFFICIENT
Statement 2: p is a multiple of 5
P can be 5, 10, 15, 50, 55 etc.
Therefore p may or may not be a multiple of 50
INSUFFICIENT
Combining Statement 1 and Statement 2:
P is a multiple of 10 and 5 both
Still p can have values such as 10, 20 , 30, 50, 100
Therefore p may or may not be a multiple of 50
INSUFFICIENT
Option E
close
70% (00:40) correct 
