It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

The answer I give is yes, but what I mean is no. What was the question?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

What goes up but never comes down?

Why 1729 is a magic number? Answer Logically.

When 99 is considered higher than 100?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?