Which 3 letters when put before and after the alphabets ---ERGRO- keeps you hidden?

Successful people always have two things on their lips - Silence and Smile!

If
1=5
2=25
3=125
4=625
5=?

A man is racing to the bathroom, a second is leaving it, and a third man is still inside?
Can you guess their nationalities?
Russian, Finnish and ......?

What is at the centre of 'Jupiter'?

Which planet goes up in the summer and down in the winter?

Success is not final, failure is not fatal: it is the courage to continue that counts!

Which was the world's 1st computer?
An Apple. Eve gave one to Adam!

You will always pass failure on your way to success!

If at first you don't succeed, call it version 1.0.