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

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

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

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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 ......?

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What is at the centre of 'Jupiter'?

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

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

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

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You will always pass failure on your way to success!

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