I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is the largest number you can write with just 3 digits?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

How many triangles can you count in the figure given?

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?