Prove that twice of ten is the same as twice of eleven.

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What do you see in the image below

What has hands, but can’t clap?

Can you decipher the two rows to find the hidden word?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Find the value of "?" in the ball picture Riddle below:

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

What is the last thing you take off before bed?