What brings you down but never up?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Can you find out the remainder when 3^300 is divided by 5?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Which word does the below Plexor means ?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

The more of this there is, the less you see. What is it?

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