I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you start the fire using two pieces of wood?

What do you see in the image below

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

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

If eleven plus two equals one, what does nine plus five equal?

What does the below rebus riddle means?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

How do you go from 98 to 720 using just one letter?