Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

What does this mean?

CCCCCCC

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What question can you never answer yes to?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

With the help clues provided in the image, can you find the 5 digit key?

Solve the following series:
AZ, GT, MN, __, YB

Do you know who was buried in John's tomb?