The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What can you deduce from the following BrainBat?

CRY
LMKI

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

I add 5 to 9 and get 2. The answer is correct, so what am I?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

What does this rebus means ?

PROG WORKRESS

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?

Spot what is wrong here in below Picture?