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

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

You need to remove two matchsticks to make the below equation true. Can you do it ?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Who are the happiest people in IPL match?

Rearrange the letters in "new door" to make one word.

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?