Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

It belongs to you, but other people use it more than you do. What is it?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

I am quite hot but become too cold if you remove the first two letters. What am I?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

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?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Replace the question mark with the correct number in the below-given picture?

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?