Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Which is faster, Heat or Cold ? Explain.

In the image given, you can find several triangles. Can you count them all?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

I have eight fingers and two thumbs but I do not live. What Am I?

How many bananas can you eat if your stomach is empty?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?