What is more useful when it is broken?

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 _

Count the Triangle in the figure given below:

Can you find out who is the kidnapper in below Picture and why, Explain ?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

I don't get anymore wetter, no matter how much rain falls on me.

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

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?