I have teeth but i don't bite. Who Am I ?

Can you count the number of blocks in the picture below?

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?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

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?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?