I travel all around the world but always stay in the corner. What am I?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

How many sides does a circle have?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

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?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

How many times in a given day, minutes and hour clock comes in a straight line ?

What has 13 hearts but no other organs?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?