Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

I add 5 to 9 and get 2. The answer is correct, so what am I?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

Solve the mathematical equation in the picture below.

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

Find the missing letter in the last circle logically in the given below picture.

What is full of holes but still holds water?