Count the number of balls in picture below:

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

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?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

What makes this number unique: 8,549,176,320?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

How many letters are in the alphabet?

Complete the table series riddle by finding the number that can replace "??".