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

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

How can one talk without saying a single word?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

Below rebus represent famous DiCaprio movie. Can you name it?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Can you find the 09 errors in the picture below?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____