Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

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

Rearrange the letters in "new door" to make one word.

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?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Solve this riddle by finding the odd one out from the rest.

What has lots of eyes, but can’t see?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

Can you find out which number multiplied by itself will give the output as 12345678987654321?