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

Be active and find the killer in the picture Riddle below.

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

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?

You bought me for dinner but never eat me. What am I?

When we see 2 but call 10?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?