Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

An ant is travelling on a 1-meter-long rope at 1 cm/second but also the entire rope is being stretched by an extra 1 meter/second. Is it possible for the ant to reach at the end of the rope?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

In the four images below, can you find the odd one out?

In which direction should the missing arrow point?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

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

Find the missing letter in the last circle logically in the given below picture.