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

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.

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

No matter how little or how much you use me, you change me every month. What am I?

Can you make a six-letter word using the letters N, A and B ?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

I always drive my customer away.

Who am I?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

Solve this riddle by finding the odd one out from the rest.