Can you find the key in the picture below?

Can you find a five letter word that is left with only two letters if one is removed?

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.

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Solve the following series:
AZ, GT, MN, __, YB

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

Do You See It?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?