Prove that the below maths equation is true.

8 + 8 = 91

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Which part of London exists in France as well ?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

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

Be active and find the killer in the picture Riddle below.

Through your logical capabilities, can you make 7 an even?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

I know a nine-letter word having only one vowel.
Do you ?

what does this below rebus represent identXQQQQQME