A man pointing to a photograph says, 'The lady in the photograph is my nephew's maternal grandmother." How is the lady in the photograph related to the man's sister who has no other sister ?

Some boys are men. No man is black
Conclusions:
1. Some boys are not black
2. Some men are boys

Pointing to an old man, Kailash said, "His son is my son's uncle." How is the old man related to Kailash ? 

Find out the wrong number in the following series ?
2880, 480, 92, 24, 8, 4, 4

Find the odd one out of the following number series?
56, 64, 48, 90, 16, 144

What will come in place of the question mark (?) in the following number series?
5, 7, ?, 25, 45, 75

Find the odd one out of the series :
35, 48, 54, 63, 81, 105

A man buys Rs. 20 shares paying 9% dividend. The man wants to have an interest of 12% on his money. The market value of each share is:

On a sum of money, the simple interest for 2 years is Rs. 660,while the compound interest is Rs.696.30,the rate of interest being the same in both the cases. The rate of interest is

Select the word which has same relation: 
Walking : Running :: Smiling : ?