There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

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?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

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