Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

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?

John bought 150 chocolates but he misplaced some of them. His Father asked him how many chocolates were misplaced.
He gave the following answer to him:
If you count in pairs, one remains
If you count in threes, two remain
If you count in fours, three remain
If you count in fives, four remain
If you count in sixes, five remain
If you count in sevens, no chocolate remains.

Can you analyze the statements and tell us how many chocolates were lost?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What Does this text mean:

important=important

Which is heavier: a ton of bricks or a ton of feathers?

What is both possible and impossible at the same time?

Which is faster, Heat or Cold ? Explain.

Decode this picture on T-Shirt and tell what it says ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?