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

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

Guess the hidden movie name?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Where do fish keep their money?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?