What do you answer even though it never asks you questions?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Find the hidden panda in the image below.

If six children and two dogs were under an umbrella, how come none of them got wet?

How can one talk without saying a single word?

There is a place where if I stand up straight, I will still be considered sideways.

You can see three almost identical images below. Can you spot the odd one out from them?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Vin Diesel is pulling a theft and has planned to run away with all the cash kept in the safe. But the only way to open the safe is the 13 character password. He has a set of five clues given to him by a trustworthy source.

Exactly two of the below statements are false.
The password is contained within this sentence.
The password is not in this hint.
The password is within only one of these statements.
At least one of the above statements is a lie.

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?