Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

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?

Can you place three balls such that the equation shown in the picture holds true?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What has hands, but can’t clap?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

By using 'because' continuously three times, can you make an English statement ?