The centre of the third figure is empty. What digit should fit inside?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

How many Watermelons are there in the below picture?

What is the end of everything?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

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"