How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Find the missing number in the image below.

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

What does it mean?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?