What has 13 hearts but no other organs?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you solve this picture maths equation?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

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?

The LCD device should be able to tell the right time in the format HH:MM: SS in a 12-hour format. You can refer to the picture to get an idea. The device is a simple "level indicator" which has to be converted into a watch. How will you program it to work?