Can you find out the total number of triangles in the given figure?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

what does this picture(rebus) riddle means ?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Identify the 10 differences between the two given pictures.

What four weights can be used to balance from 1 to 30 pounds?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.