I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

What goes through cities and fields, but never moves?

How many times can you subtract the number 5 from 25?

I have branches, but no fruit, trunk or leaves. What am I?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

What number divided by 4 is the same as that number minus 4?