What can you see in the middle of March and April that you can never see in any other month?

Can you count the number of lines in the below picture?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

You need to arrange three 7 and mathematical symbols to form number 1?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

If you say my name, I will no longer exist. What am I?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?