I am an odd number. Take away a letter and I become even. What number am I?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Which wheel of car does not rotate when you turn your car right?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Rearrange the letters in "new door" to make one word.

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

What is the fastest way to double your money?

Move four matchsticks to the below square to form three squares?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.