What is full of holes but still holds water?

I am the fastest animal but cannot climb the tree. What am I?

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

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?