What month of the year has 28 days?

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

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

How many letters are in the alphabet?

I am white when I am dirty, and black when I am clean. What am I?

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?

What has one letter and starts with an E?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?