2, 3, 5, 9, 17, _ What is the next number in the sequence?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

What does this rebus mean?

O
N
C
E
TIME

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Count the number of balls in picture below: