What word does this rebus represent?

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Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

A Club organizes a Running Race, and John, Jacob, Minda, and Tony participated.

The results are as follows

John beats Jacob
Minda beats Toni
Toni beats John

Who came first in the race?

Can you solve the below geography rebus by decoding the below rebus ?

Find the Goldfish below the given Image.

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Replace the question mark with the number below given a simple math problem.