Replace the question mark with the correct number below.

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

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

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

Some friends went on a vacation to a resort. It was raining heavily and it kept raining for thirteen days.

When it rained in the morning, the afternoon was beautiful and when it rained in the afternoon, the day was blessed with a clear morning.

Overall, the friends experienced eleven nice mornings and twelve nice afternoons. Can you find out the number of days they spent on vacation?

People put me on the table and cut me but do not eat me. What am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

Be active and find the killer in the picture Riddle below.