What is the next number in this matchsticks series riddle?

81 x 9 = 801. What must you do to make the this equation true?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

What is the fastest way to double your money?

The more of this there is, the less you see. What is it?

Which Burger Is Different in below image?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

Find the next number in the series below.

6 18 270 72090 ?

Can you find the six hidden animals in the picture below?