I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What has 13 hearts but no other organs?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

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

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

Find the next number in the series.
1 10 24 43 67 ?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

If 1+9+8=1, what is 2+8+9?