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

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Can you solve the photo plexer logic ?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

In which direction should the missing arrow point?

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

Can you place six X (crosses) in below board without making three in a row in any way ?

I know a nine-letter word having only one vowel.
Do you ?

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?