What is the Surname of Barbie Doll?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Identify the hidden meaning behind this picture?

Take away the whole and some still remain. What is it?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

Count the number of lines in the image below ?

Prove that twice of ten is the same as twice of eleven.

Trying to tease Birbal, Akbar gave him one gold coin and ask him to buy
* something for him to eat
* something for him to drink.
* something to feed the cows
* something to plant in the garden
and most important you need to buy only one thing.

What must Birbal buy to silence Akbar?