What is black when you buy it, red when you use it, and gray when you throw it away?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

If your uncle’s sister is not your aunt, what relation is she to you?

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

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

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

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside.
The man said, "Oh! I am really sorry, I thought this was my room."
He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man.
What made her suspicious of that man? He might have been genuinely mistaken.

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

Can you write down eight eights so that they add up to one thousand?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?