Can you fill the blank with the correct number?

6 30 870 756030 _____

Can you count the number of triangles in the given picture?

In which direction should the missing arrow point?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

What does this Rebus Picture means ?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

A blonde put eyeliner on her head. Why?