If you say my name, I will no longer exist. What am I?

Count the squares in the matchstick puzzle below?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

Rearrange the letters in "new door" to make one word.

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

Count the Triangle in the figure given below:

Can you find a five letter word that is left with only two letters if one is removed?

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?

Can you find the thief by just looking at the picture below?