I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Can you make a fire with just a single stick?

There is something which you can be arrested for attempting but not for successfully completing.

Buy me, smell me or deliver me, I do not change.

Who am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

Count the number of lines in the image below ?