A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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

Which tank will fill first?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Which digit occurred maximum times between the number 1 and 1000?

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98