This mathematical problem is killing the Internet. Can you solve this?
6 ÷ 2 (1 + 2) =?

First in round, then square is bound, in triangle form is the last shape found.
What am I?

What is the next number?

1, 4, 1, 5, 9, 2, ?

A seed with three letters in my name. Take away two and I still sound the same. 
What am I?

I am six times longer than the Amazon, a fifth of my is dry and the rest is wet.
What am I?

What fruit can you use to sip water?