I am white when I am dirty, and black when I am clean. What am I?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Can you guess the name of the month by looking the below rebus ?

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

How many times can you subtract the number two from the number fifty?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

Which is heavier: a ton of bricks or a ton of feathers?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?