What comes in place of question mark (?) in the series given below?
W-144, ?, S-100, Q-81, O-64

Pointing to a man, a man said to a woman, "Your father's only daughter is his mother." How is the woman related to that person.

If the average weight of 4 students is 65 kg. and the weight of 3 students are 60 kg., 65 kg. and 70 kg. respectively, then what would be the weight of the fourth student? 

Directions : Find the missing number from the given responses in each of the following questions . 

There is a group of five persons, namely of  A, B, C, D & E
i) ‘A’ is shorter than "B". But taller than E
ii) 'C' is the Tallest
iii ) 'D' is shorter than B, but taller than 'A'.
Reply the following questions on the basis of above information.
If all five persons stand according to height, then who will be in mid of them? 

Select the missing number from the given responses.

If lead is called stick, stick is called nib, nib is called needle, needle is called rope, and rope is called thread, what will be fitted in a pen to write with it?