Who can jump higher than a Mountain?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Can you guess the name of the month by looking the below rebus ?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

A time long back, there lived a king who ruled the great kingdom of Trojan House. As a part of the renovation of the kingdom to meet future security needs, he asked his chief architect to lay down a new play in a manner that all of his 10 castles are connected through five straight walls and each wall must connect four castles together. He also asked the architect that at least one of his castles should be protected with walls. The architect could not come up with any solution that served all of King's choices, but he suggested the best plan that you can see in the picture below. Can you find a better solution to serve the king's demand?