Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

You see me once in June, twice in November, and not at all in May. What am I?

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.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What building has the most stories?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Can you place six X (crosses) in below board without making three in a row in any way ?

What do you see in the image below