I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

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

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Before Balboa discovered the Pacific Ocean, which was the largest ocean before that?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What kind of band never plays music?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

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

What makes this number unique: 8,549,176,320?