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

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

What has to be broken before you can use it?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

I have no life, but I can die. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

What is the Surname of Barbie Doll?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?