I have Rs.50 and I spend it in the way as below.

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?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Can you start the fire using two pieces of wood?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?