There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

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

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Why Aeroplane windows are round?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

In a kingdom, King George did not allow any citizen to visit the world outside. Also, only a person with proper paperwork was allowed to enter or he was sent back. A wooden bridge was what connected the kingdom to the world. The king had appointed a sharpshooter who would check the every five minutes on the bridge to check. After checking, he would go back to his hut and return exactly after five minutes again. The bridge took 9 minutes to cross.

A merchant was able to escape the kingdom without harming the shooter. How?

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

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?