What does the below image rebus riddle means ?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Find the number of squares in the below-given picture.

who is silent in the parliament?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Through your logical capabilities, can you make 7 an even?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n