what can be measure but not seen

(a)  

You measure my life in hours and I serve you by expiring.The wind is my enemy.

(a)  

i have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

(a)  

What is seen in the middle of March and April that can’t be seen at the beginning or end of either month?

write shortest ans

(a)  

You see a boat filled with people. It has not sunk, but when you look again you don’t see a single person on the boat.

(a)  

the first 2 letters signify a male, the first3 letters signify a female, the first4 letters signify a male, while the entire world signifies a woman.

(a)  

I come from a mine and get surrounded by wood always. u surely uses me

(a)  

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

write ans as

no. of brother<>no. of sister

(a)  

What disappears as soon as you say its name?

(a)  

black when brought

red when using

grey when thrown

(a)