It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Count the number of triangles in the below picture?

What does this mathematical rebus means ?

What number when divided in half becomes zero?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

What jumps when it walks and sits when it stands?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!