A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Which number comes next in the number series?

2, 9, 30, 93, ?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

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

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

I travel all around the world but always stay in the corner. What am I?

Find the value of "a" by solving the maths equation in the picture below:

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

You bought me for dinner but never eat me. What am I?