When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

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

What word does this rebus represent?

meta meta
meta meta

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

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

On a special event at the prison, 5 prisoners John, Jacob, Krist, Tang, and Dang given a chance to go to a sauna and can bring one thing with them.

Following are the things that the prisoners bring with them.
John: A soda
Jacob: Thermos
Krist: Book named "How to kill"
Tang: A Walkman
Dang: Harmonica

Since it is a Sauna, no one can see each other. After a while When the steam is switched, Tang was found dead and there was blood all around.
J Bond was called and he instantly come to know who can be the murderer. How?

Complete the table series riddle by finding the number that can replace "??".

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you start the fire using two pieces of wood?