Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Which five letter word can be added at the end of below word to form a
valid word?

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For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

I shave every day, but my beard stays the same. What am I?

What is the relationship between these matchstick pictures below?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?