Can you count the number of triangles in the given figure?

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?

How many letters are in the alphabet?

Can you write down eight eights so that they add up to one thousand?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

What's the only room from which no one can enter or leave

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?