What occurs twice in a week, once in a year but never in a day?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

How can you make a TV, a bed, a dog, and a car liquid?

Find the value of "?" in the ball picture Riddle below:

What is the centre of gravity?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

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?