You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

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

Why did the Girl throw the butter out of the window?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Move three sticks of the spiral below to form a square.

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?

Can you count the number of quadrilaterals in the picture below?

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?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

The more you take me, the more you leave me behind.
Who Am I?