How many triangles are there on the puzzle below?

Can you find the hidden animal in the picture below?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Why Wine Glass Stem is so long?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?