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?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

They are three errirs in this question. Can you find them?

I’m tall when I’m young, and I’m short when I’m old. What am I?

I know a nine-letter word having only one vowel.
Do you ?

What is the next number in this matchsticks series riddle?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

I add 5 to 9 and get 2. The answer is correct, so what am I?

What is common among 11, 69, and 88?

What will you call your mother's brother's brother-in-law?