Puzzles for smart ones

What letter is next in this sequence?
O, T, T, F, F, S, S, E, __

M, A, M, J, J, A, S, O,__

How could the 22nd and 24th U.S. Presidents have the same parents, but weren’t brothers

What is full of holes but still holds water?

What came first, the...

chicken or the egg?

O, T, T, F, F, S, S, E, N (nine)

M, A, M, J, J, A, S, O, N (november)

Grover Cleveland was elected twice

Sponge

Egg (but in your question - chicken)

The blanks are E and A.
Grover Cleveland was the 22nd and 24th President.
A sponge is full of holes but still holds water.
Whether the chicken or the egg came first is a mystery that may remain unsolved.

Egg (but in your question - chicken)

dinosaurs laid eggs before there were chickens so the answer is eggs

did you cheat ?

How can I cheat? it's obvious there were eggs before chickens.

Neither the chicken or the egg... The dinosaur... They're closely related to the chicken right? so the dinosaur

...

im talking about the other question , did you google them

No, I didn't google them - they're obvious.