Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

who is silent in the parliament?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

10+10 and 11+11 can give you the same answer.

Explain how?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

In the addition below, all digits have been replaced by letters.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?

Can you fill the blank with the correct number?

6 30 870 756030 _____

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Spot 5 differences in two Christmas tree below:

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?