There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

You have two jars of chocolates labelled as P and Q. If you move one chocolate from P to Q, the number of chocolates on B will become twice the number of chocolates in A. If you move one chocolate from Q to P, the number of chocolates in both the jars will become equal.

Can you find out how many chocolates are there in P and Q respectively?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?