What is common among 11, 69, and 88?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

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

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

What number do you get when you multiply all of the numbers on a telephone's number pad?

How could a baby fall out of a twenty-story building onto the ground and live?