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

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

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Buy me, smell me or deliver me, I do not change.

Who am I?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Give it food and it will live; give it water and it will die.

How can you make number one disappear by adding something to it?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

what does the below rebus means?

What word is pronounced the same if you take away four of its five letters?